Compare Refractive Eye Surgeries: Which Vision Correction Procedure Is Right for You?

There are several advanced refractive surgeries available, tailored to address specific visual needs and conditions, as well as individual lifestyles and personal preferences. The most popular ones are WaveLight Plus InnovEyes, SILK, SMILE, SMILE Pro, Contoura Vision, standard LASIK, TransPRK, and CustomEyes.

Each procedure offers distinct advantages based on its surgical mechanism, degree of personalisation, and recovery profile. This means finding the right refractive surgery begins with identifying a patient’s individual needs and visual goals.

The evolution of refractive surgery began in 1948 when Father Wacław Szuniewicz performed the earliest documented corneal reshaping for astigmatism.

In 1964, Dr. José Ignacio Barraquer introduced keratomileusis and invented the microkeratome, establishing the basis for future procedures such as PRK and LASIK. Radial keratotomy (RK) gained popularity in the 1970s but was later discontinued due to its long-term refractive instability.

The 1980s marked the development of PRK with the advent of the excimer laser, followed by the FDA approval of LASIK in the 1990s, which enabled faster recovery through corneal flap creation.

By the 2000s, innovations such as topography-guided LASIK and SMILE introduced greater precision and structural preservation.

Recent advancements, including WaveLight Plus InnovEyes, CustomEyes, SMILE Pro, and SILK, represent a paradigm shift toward fully personalised, data-driven, and minimally invasive refractive solutions. These innovations are designed to enhance accuracy, safety, and long-term visual outcomes across a wide range of refractive conditions.

This article lists multiple modern refractive procedures, including WaveLight Plus InnovEyes, SILK, SMILE, SMILE Pro, CLEAR, SmartSurf, EpiContoura, Contoura Vision, LASIK, Trans-epithelial PRK, CustomEyes, and SmartLASIK, along with their mechanisms, advantages, and ideal candidates, as well as a comparison chart. It helps readers identify the best refractive surgeries for any individual, considerations before selecting a procedure, and the top advanced hospitals for these surgeries.

This think-piece aims to provide clear and accessible information about each modern refractive surgery technique to help readers make an informed decision.

Comparison of WaveLight Plus InnovEyes vs SILK vs SMILE vs SMILE Pro vs Contoura Vision vs LASIK vs Trans-epithelial PRK vs CustomEyes

The comparison between WaveLight Plus InnovEyes, SILK, SMILE, SMILE Pro, CLEAR, SmartSurf, EpiContoura, Contoura Vision, LASIK, Trans-epithelial PRK, CustomEyes, and SmartLASIK is presented in the table below, with respect to core technology, flap creation, popularity, ideal patient suitability, customisation level, recovery speed, risk of dry eyes, FDA approval status, and vision outcomes:

Technology	Core Technology (Procedure + Technology + Eye Modeling)	Flap Creation	Popular For	Ideal Patient	Customization Level	Recovery Speed	Dry Eye Risks	FDA Approval	Vision Outcomes
WaveLight Plus InnovEyes	AI-guided LASIK with advanced eye modelling	Both flap and flapless are available	AI-personalised, eye-tracking precision	High-performance users, custom cases	Very High, 100%	Fast (1-2 days)	Moderate	Yes	6/6 to 6/5 (occasionally 6/4 and 6/3 in ideal cases)
SILK	Flapless femtosecond lenticule	No	No-touch, smooth stromal interface	Precision-critical users, sports professionals	Moderate	Fast (1-2 days)	Low to Moderate	No	6/6 typical, 6/5 possible
SMILE	Flapless femtosecond lenticule	No	Small incision, minimal disruption	General myopia/astigmatism patients	Moderate	Moderate (2-3 days)	Low to Moderate	Yes	6/6 typical, 6/5 possible
SMILE Pro	High-speed SMILE with improved modeling	No	Faster scan speed, ergonomic improvements	High prescriptions, fast recovery	Moderate-high	Moderate (2-3 days)	Low to Moderate	Yes	6/6 to 6/5
CLEAR	Custom lenticule with adaptive modeling	No	Dissection-free lenticule extraction with wavefront integration	Patients seeking flapless surgery with better night vision than standard SMILE	High	Fast (1-2 days)	Low to Moderate	No	6/6 to 6/5
SmartSurf	SmartPulse surface PRK	No	Single-step, touchless TransPRK with smart pulse technology	Thin corneas, contact sport athletes, patients avoiding any mechanical contact	Moderate	Moderate (3-5 days)	Low	Yes	6/9 to 6/6
EpiContoura	Topography-guided PRK	No	Repositioned epithelial sheet with topography-guided ablation	Patients wanting less pain than PRK but avoiding flap; irregular astigmatism	High	Moderate (3-5 days)	Low	No	6/6 typical, occasionally 6/5
Contoura Vision	Topography-guided LASIK	Yes	Topography-guided ablation	Irregular cornea topography	High	Fast (1-2 days)	Low to Moderate	Yes	6/6 to 6/5, occasionally better
LASIK	Standard excimer LASIK	Yes	Quick, proven, widely available	Common refractive error correction	Moderate	Fast (1-2 days)	High	Yes	6/6 typical
TransPRK	No-touch excimer PRK	No	Surface-based, preserves corneal tissue	Thin corneas, patients with military or athletic goals	Moderate	Slow (3-7 days)	Low	Yes	6/9 to 6/6
CustomEyes	AI-customised LASIK	No	Fully individualised treatment	Ultra-personalised visual correction	Very High	Fast (1-2) days	Low to Moderate	Only in the US	6/6 to 6/5
SmartLASIK	Femtosecond-assisted LASIK	Yes	Blade-free flap creation with excimer ablation	Healthy corneas seeking the fastest recovery; established, widely available technology	High	Very Fast (1 day)	Moderate to High	Yes	6/6 typical, 6/5 possible

Overview of Each Refractive Surgery Technique

Each refractive surgery procedure, including WaveLight Plus InnovEyes, SILK, SMILE, SMILE Pro, CLEAR, SmartSurf, EpiContoura, Contoura Vision, LASIK, Trans-epithelial PRK, CustomEyes, and SmartLASIK, is described in detail below, along with its procedural mechanism, distinct clinical advantages, and ideal patient profiles.

WaveLight Plus InnovEyes

WaveLight Plus InnovEyes (also called InnovEyes) is a next-generation refractive correction surgery developed by Alcon, available in flap-based and flapless versions. It is a type of LASIK that utilises AI-based planning and advanced full-eye ray-tracing diagnostics to create highly individualised treatments.

Unlike traditional LASIK procedures that focus on the shape of the cornea, InnovEyes builds a comprehensive, digital model of the eye (also called “EyeVatar”). This ensures customised correction across the entire visual pathway of the eye, not just the surface, offering improved results and reduced side effects.

How it Works

The WaveLight Plus InnovEyes procedure begins with multimodal imaging, utilising integrated technologies such as Scheimpflug tomography, wavefront sensing, and optical biometry. It captures over 30,000 data points on the cornea, lens, retina, and internal aberrations.

Using this data, InnovEyes creates the EyeVatar to simulate how light travels through the eye, identifying and mapping the most subtle distortions. The system guides AI-based ray tracing, which generates a precise excision plan that addresses both lower- and higher-order aberrations.

Then, the WaveLight EX500 excimer laser performs the surgery, offering high-speed, high-precision reshaping of the cornea.

Key Benefits

The most valued benefit of WaveLight Plus InnovEyes is its integration of artificial intelligence and biometric data to plan each procedure. Additional procedural benefits of WaveLight Plus InnovEyes are listed below:

• InnovEyes considers the entire optical axis to ensure correction for internal anomalies and lens alignment issues, ensuring high personalisation.
• WaveLight Plus InnovEyes noticeably reduces night vision disturbances such as halos or glare.
• Patients undergoing this surgery attain visual acuity of 6/6 or better, including 6/5 or 6/4, which is also known as “Eagle Vision.”
• The procedure is super fast, taking less than 15 seconds per eye.
• Most patients notice visual improvement within 24 hours of the surgery and heal rapidly in the following days.
• The ray-tracing model of the procedure identifies distortions at multiple depths in the eye, treating complex visual imperfections that standard LASIK may miss.

Who is it Best Suited For?

WaveLight Plus InnovEyes is best suited for patients who are:

• Eligible for LASIK but desire a higher level of customisation and long-term clarity.
• Affected by complex refractive errors, including astigmatism or higher-order aberrations, that are not fully addressed by traditional or topography-guided LASIK (like Contoura).
• Seeking the best possible visual outcomes, including individuals with active lifestyles, surgeons, athletes, pilots, designers, or anyone for whom visual precision is critical.
• Concerned about night vision quality, glare, or halos often associated with standard LASIK procedures.

SILK

SILK (Smooth Incision Lenticule Keratomileusis) is a fourth-generation, flapless refractive surgical procedure developed by Johnson & Johnson Vision. It corrects myopia and myopic astigmatism while preserving corneal integrity.

The process utilises the advanced Elita femtosecond laser, designed for creating ultra-smooth lenticules with high-speed scanning and low-energy pulses. This enhances the surgical precision and promotes faster healing.

How It Works

The SILK procedure begins by creating a refractive lenticule with exceptionally smooth edges inside the corneal stroma using the Elita femtosecond laser. The lenticule is removed through a 2-3 mm microincision without lifting a flap, preserving anterior corneal strength.

The process reshapes the curvature of the cornea to focus light correctly on the retina. It effectively corrects the refractive error while maintaining biomechanical stability.

Key Benefits

One of the primary advantages of SILK is its accelerated corneal recovery, achieved by eliminating the need for corneal flap creation during refractive correction. In addition to rapid healing, SILK offers the following clinical benefits to patients:

• The SILK procedure is performed entirely within the corneal stroma. It preserves the front layers of the eye, maintains long-term corneal strength, and reduces the likelihood of complications during the recovery process.
• The Elita laser system creates smooth cuts, making lenticule removal easier and offering clearer vision.
• Elita uses low-energy, high-frequency pulses to reduce the chances of impacting healthy tissues and causing inflammation.
• The process cuts fewer nerves and preserves the epithelial tissue. This further reduces the chances of post-operative eye dryness and inflammation compared to LASIK or PRK.
• Most patients regain functional vision within 24 to 48 hours after the procedure. The microincision heals naturally within a few days. Patients achieve complete clarity by the end of the first week.

Who is it Best Suited For?

SILK procedure is especially suited for patients who are:

• Seeking flap-free vision correction with minimal invasiveness and fast recovery.
• Concerned about dry eyes or were unsuitable for LASIK due to pre-existing dryness or nerve sensitivity.
• Active individuals or athletes exposed to risk of eye trauma, where flap dislocation (a risk with LASIK) must be avoided.
• Professionals in fields that require precision, such as pilots, surgeons, and photographers, where optical clarity and night vision disturbances are inconvenient.
• Eligible for SMILE or LASIK but want an advanced, smoother option.

SMILE

SMILE (Small Incision Lenticule Extraction), developed by ZEISS, is a third-generation, flapless laser vision correction procedure designed to treat myopia and myopic astigmatism.

It utilises the VisuMax femtosecond laser to create and remove a tiny lenticule within the corneal stroma through a microincision. This helps preserve the surface of the eye while maintaining greater corneal strength than LASIK.

This process bridges the gap between surface surgical techniques, such as PRK, and flap-based procedures, like LASIK.

How It Works

The SMILE procedure begins with the ZEISS VisuMax laser creating a lenticule within the corneal stroma using ultra-fast, precise pulses, which separate the tissue layers.

The surgeon creates a 2-4 mm microincision and gently removes the lenticule using blunt dissection techniques.

After removal, the cornea naturally reshapes the correct curvature. This further improves how light focuses on the retina while leaving the front corneal layers largely intact.

Key Benefits

SMILE’s leading benefit is its flapless approach, which makes it gentler on the eye and safer for active individuals. The following are some other key benefits:

• SMILE doesn’t create a corneal flap, reducing the chance of flap dislocation, wrinkles, and other related complications.
• SMILE severs fewer corneal nerves compared to LASIK, which results in significantly lower rates of postoperative dryness.
• The microincision accelerates the healing process, and vision improvement begins within 24-72 hours.
• It doesn’t affect the stronger front corneal layers, so the eye’s structural integrity remains stable.

Who is it Best Suited For?

SMILE offers significant advantages for those who are:

• Eligible for LASIK but prefer a flap-free alternative.
• Active or in contact sports, where flap-related trauma is a risk (e.g., martial artists, military personnel, athletes).
• Concerned about dry eyes and have existing symptoms or risk factors for dryness.
• Younger adults with stable myopic prescriptions and good corneal thickness.
• Interested in minimally invasive procedures with lower post-op discomfort and a rapid return to normal activities.

SMILE Pro

SMILE Pro, developed by ZEISS, is an advanced level of SMILE surgery designed to treat myopia and astigmatism through a flapless, lenticule extraction process.

The minimally invasive refractive surgery utilises the next-generation VisuMax 800 femtosecond laser, which significantly reduces laser time.

The technique offers faster laser speed and centration accuracy, ensuring a more comfortable experience for patients.

How It Works

SMILE Pro uses the advanced VisuMax 800 laser to create a lenticule in just 7-10 seconds (nearly half the time of earlier devices, like the VisuMax 500).  

The system automatically aligns the laser to the visual axis and adjusts for subtle eye rotations (cyclotorsion). It ensures better precision in lenticule creation, which is important for patients with astigmatism.

After creating the lenticule, the surgeon removes it through a 2-3 mm incision. The advanced laser interface ensures a cleaner cut, making dissection and removal smoother, resulting in greater patient comfort.

Key Benefits

The most significant advantage of SMILE Pro is its enhanced laser speed compared to standard SMILE, which contributes to shorter procedure time and improved patient comfort. Additional clinical benefits of SMILE Pro include:

• Reduced treatment time of SMILE Pro lowers stress on the eye, reduces patient fatigue, and minimises eye movement during the surgery. This improves overall accuracy and reduces the risk of inflammation.
• SMILE Pro, being minimally invasive, doesn’t involve flap creation, preserving corneal strength and reducing the risk of dry eye.
• SMILE Pro achieves better refractive precision for patients with complex astigmatic profiles using automated eye tracking and cyclotorsion alignment.
• Most patients experience sharper vision within 24 to 48 hours. Vision stabilises faster compared to conventional SMILE.
• Shorter suction time and ergonomic improvements enhance the experience, making it less intimidating for patients.

Who is it Best Suited For?

The SMILE Pro method is particularly beneficial for those who are:

• Eligible for SMILE or LASIK, but desire the latest, most efficient laser platform.
• Patients with astigmatism, where precision centration and torsional compensation can improve results.
• Nervous or time-sensitive individuals who need a shorter treatment duration and a more comfortable interface.
• Active professionals or athletes, looking for flap-free recovery with minimal downtime and biomechanical strength.
• Candidates who have already undergone prior refractive procedures.

CLEAR

CLEAR (Customised Lenticule Extraction for Advanced Refraction) is a next-generation, flapless refractive surgery developed by Bausch & Lomb. It represents a fusion of the biomechanical advantages of SMILE with the personalised, wavefront-optimised precision historically found in advanced LASIK platforms. CLEAR is designed to treat myopia and myopic astigmatism while prioritising corneal integrity and the reduction of higher-order aberrations.

Unlike traditional lenticule extraction procedures that use a standard, one-size-fits-all optical zone, CLEAR integrates intraoperative aberrometry and adaptive centration. This ensures the lenticule is not only smooth but also geometrically optimised for each patient’s unique visual axis, offering a level of customisation previously unavailable in flapless surgery.

How It Works

The CLEAR procedure begins with high-definition optical coherence tomography (OCT) and wavefront aberration mapping. This dual-modality system scans the corneal stroma and measures both lower and higher-order aberrations across the entire pupil.

Using this data, the CLEAR software generates a “Refractive Lenticule Blueprint” that dictates the exact thickness, diameter, and edge profile of the tissue to be removed. The procedure is performed using the Stellaris Elite femtosecond laser, which operates at 2 MHz pulse repetition. This laser creates the lenticule and a 1.8-2.5 mm microincision in under 10 seconds.

Unlike SMILE or SILK, CLEAR utilises a split-focus scanning pattern that pre-separates the lenticule from the surrounding stroma during creation. This eliminates the need for blunt mechanical dissection, allowing the surgeon to extract the lenticule with gentle forceps without additional tools, thereby reducing tissue trauma.

Key Benefits

The most valued benefit of CLEAR is its dissection-free lenticule extraction, which minimises postoperative inflammation and accelerates neuroregeneration. Additional procedural benefits of CLEAR are listed below:

• By preserving the majority of sub-basal corneal nerves and avoiding a flap, CLEAR reduces dry eye symptoms with outcomes comparable to SMILE but with faster nerve recovery.
• The intraoperative wavefront integration corrects spherical aberration and coma during lenticule planning, resulting in superior night vision quality and fewer complaints of starbursts or ghosting.
• The procedure preserves the anterior corneal lamellae and Bowman’s layer entirely, maintaining the majority of the eye’s original structural integrity. This makes the cornea significantly more resistant to ectasia than LASIK.
• Most patients achieve 6/6 (20/20) vision within 24 hours, with many reaching 6/5 (20/16) within one week. The lack of dissection-related oedema allows for clearer early vision compared to other lenticule procedures.
• As a flapless procedure, CLEAR is ideal for contact sports, military aviation, and professions where ocular trauma is a concern.

Who is it Best Suited For?

CLEAR is best suited for patients who are:

• Eligible for SMILE or SILK but desire enhanced customisation for night vision and astigmatism correction that standard lenticule surgery cannot provide.
• Affected by higher-order aberrations (e.g., significant spherical aberration or coma) that require wavefront-guided planning beyond basic myopic correction.
• Seeking a flapless procedure but concerned about the blunt dissection or lenticule tearing sometimes associated with earlier generation SMILE.
• Individuals with moderately dry eyes who are unsuitable for LASIK but want faster nerve healing than PRK offers.
• Active patients (athletes, military personnel, law enforcement) require maximum corneal strength without compromising on refractive precision.
• Patients with thin corneas (480-500 microns) who are not candidates for LASIK but have sufficient stromal thickness for lenticule extraction.

SmartSurf

SmartSurf (Smart Surface Ablation) is an advanced, single-step, flapless refractive surgery developed by Schwind EyeTech-Solutions (now part of Alcon). It is a next-generation form of TransPRK (Transepithelial Photorefractive Keratectomy) that combines epithelial removal and corneal stromal ablation into a single, seamless laser process.

Unlike traditional PRK, which requires manual scraping or alcohol-based removal of the epithelium, or standard TransPRK, which uses separate lasers for two steps, SmartSurf uses a single excimer laser (the AMARIS) to perform both functions in a single, continuous, smart-pulsed sequence. This eliminates human error, preserves more epithelial stem cells, and offers a truly touchless experience.

How It Works

The SmartSurf procedure begins with the SCHWIND AMARIS 1050RS excimer laser, which operates at a 1050 Hz repetition rate. The laser first applies a specialised epithelial ablation profile that removes the corneal epithelium layer-by-layer using high-frequency, low-energy pulses. This “smart” profile respects the natural variations in epithelial thickness across the cornea.

Immediately following epithelial removal, without moving the patient or changing lasers, the same AMARIS laser transitions to stromal ablation. It reshapes the underlying corneal tissue based on the patient’s refraction. The entire process is guided by SmartPulse Technology, which distributes laser spots unevenly to prevent thermal buildup and reduce corneal haze.

The system also integrates 7D eye tracking (including cyclotorsion and Z-axis movement) and IntelliWave® aberrometry to correct both lower and higher-order aberrations during the ablation.

Key Benefits

The most valued benefit of SmartSurf is its single-step, touchless workflow, which eliminates mechanical trauma to the cornea. Additional procedural benefits of SmartSurf are listed below:

• Unlike other surface ablations, SmartSurf requires no blade, alcohol, brush, or separate laser. The entire procedure takes 30-60 seconds per eye with zero mechanical contact.
• The SmartPulse technology minimises thermal damage to surrounding tissue, significantly reducing the incidence of corneal haze and the need for long-term steroid use.
• The smart epithelial profile removes only the necessary cells, leaving the limbal stem cell niche intact for faster, more predictable regeneration.
• Integration of wavefront-optimised and aberrometry-guided ablation corrects spherical aberration, reducing glare and halos more effectively than standard PRK or LASIK.
• SmartSurf is completely flapless and does not require intra-stromal dissection or lenticule removal, eliminating risks of flap dislocation, suction loss, or retained lenticule fragments.
• Mo flap is created, and no stromal pocket is needed, so SmartSurf is suited for patients with corneal thickness as low as 450 microns.

Who is it Best Suited For?

SmartSurf is best suited for patients who are:

• Not candidates for LASIK or SMILE due to thin corneas, irregular topography, or previous refractive surgery.
• Involved in high-impact contact sports (boxing, MMA, rugby) where any risk of flap dislocation is unacceptable.
• Concerned about dry eye and willing to accept a slightly longer initial recovery for superior long-term corneal surface health.
• Seeking a touchless, no-blade, no-suction procedure for psychological or medical reasons (e.g., anxiety about femtosecond suction rings).
• Patients with corneal irregularities or mild keratoconus who require topography-guided surface ablation.
• Individuals who have high prescriptions combined with thin corneas, for whom lenticule extraction may not be feasible.

EpiContoura

EpiContoura (Epithelial Contoura) is an advanced topography-guided, flapless surface ablation procedure developed by Nidek in collaboration with Alcon. It combines the epithelial preservation benefits of Epi-LASIK (using a specialised epithelial separator rather than alcohol or a laser) with the precision of Contoura® topography-guided ablation to treat myopia, hyperopia, and astigmatism.

Unlike traditional PRK or even SmartSurf, EpiContoura preserves a viable, intact epithelial sheet during removal, which is then repositioned after stromal ablation. This biological bandage accelerates healing, reduces pain, and minimises haze formation while leveraging the superior outcomes of topography-guided correction.

How It Works

The EpiContoura procedure begins with the Nidek EPI-K epithelial separator, a specialised oscillating blunt microkeratome that gently separates the corneal epithelium as a single, intact, viable sheet. Unlike alcohol or mechanical scraping, this method preserves desmosomal junctions and basal epithelial cell viability.

Once the epithelial sheet is reflected (not discarded), the Alcon EX500 excimer laser performs Contoura® topography-guided ablation. This laser uses data from the WaveLight Topolyzer VARIO to map over 22,000 elevation points on the anterior cornea, creating a personalised ablation profile that regularises the corneal surface to its ideal aspheric shape.

After the stromal ablation is complete, the surgeon carefully repositions the preserved epithelial sheet over the treated stroma. A bandage contact lens is placed for 3-5 days while the epithelium re-adheres and regenerates.

Key Benefits

The most valued benefit of EpiContoura is the repositioning of a viable epithelial sheet, which transforms the surface ablation recovery experience. Additional procedural benefits of EpiContoura are listed below:

• The epithelial sheet remains alive and is repositioned, so nerve endings are protected during the critical first 48 hours. Patients report less pain compared to standard PRK or TransPRK.
• The preserved epithelial sheet provides a smooth optical surface immediately after surgery. Many patients achieve functional vision (6/12 or better) within 48-72 hours, significantly faster than PRK.
• The biological barrier created by the repositioned epithelium reduces inflammatory cell infiltration and collagen deposition, resulting in corneal haze rates comparable to LASIK.
• Contoura technology corrects not just the refractive error but also subtle corneal asymmetries and higher-order aberrations, achieving 6/6 vision or better in over 92% of patients.
• EpiContoura avoids femtosecond laser suction rings (which can cause transient vision loss or subconjunctival haemorrhages) and eliminates the risk of flap complications or retained lenticules.
• Like all surface procedures, EpiContoura maintains the full thickness and strength of the cornea, making it suitable for active patients and those with borderline corneal thickness.

Who is it Best Suited For?

EpiContoura is especially suited for patients who are:

• Eligible for PRK or TransPRK but want a less painful recovery and faster early visual return than those procedures offer.
• Not candidates for LASIK due to thin corneas, dry eye, or lifestyle factors (contact sports, combat roles).
• Seeking topography-guided correction for irregular astigmatism, decentered previous ablation, or mild corneal irregularities that wavefront-optimised LASIK cannot address.
• Concerned about the pain and prolonged healing associated with traditional PRK but unwilling to accept flap risks.
• Patients with previous LASIK or SMILE requiring an enhancement, where creating a new flap or lenticule is unsafe.
• Individuals with epithelial basement membrane dystrophy (EBMD) or recurrent corneal erosion syndrome, where preserving and repositioning the epithelium offers therapeutic benefits beyond refractive correction.

Contoura Vision

Contoura Vision is a topography-guided LASIK procedure approved by the US FDA to treat myopia, astigmatism, and corneal surface irregularities.

It is the only LASIK platform approved to treat corneal irregularities as a primary concern beyond just nearsightedness, farsightedness, and astigmatism.

A clinical study shows that the treatment has helped 92.6% of patients achieve 20/20 vision or better. Additionally, 66.7% of the treated eyes achieved 20/16 vision, and 15.7% of the eyes achieved 20/10 vision.

How It Works

The Contoura Vision treatment begins by using the Topolyzer VARIO to measure over 22,000 elevation points on the cornea. It maps the eye’s curvature and microscopic irregularities.

Using the data, the surgeon employs planning software to generate a customised treatment plan. The plan includes both refractive error correction and topographic surface regularisation.

Next, a corneal flap is created using a femtosecond laser or microkeratome. The WaveLight excimer laser performs the ablation with real-time guidance from the topography map data. The flap is repositioned after the reshaping process is complete.

Key Benefits

Contoura Vision’s core benefit is its ability to correct both refractive errors and corneal irregularities, offering exceptionally personalised vision correction. Additional benefits are listed below:

• Each eye receives a unique correction profile based on its topographic data in Contoura Vision, ensuring highly personalised treatment.
• It offers sharper, clearer vision with better detail resolution, especially in low-light or at night.
• The treatment resolves surface irregularities, minimising common postoperative complaints, such as halo, glare, and night vision distortion.
• The ablation is more precise and refined, resulting in smoother recovery and fewer complications compared to older LASIK procedures.
• Patients experience significant visual improvement within 24-48 hours.

Who is it Best Suited For?

Contoura Vision is an excellent choice for patients who:

• Have mild to moderate myopia with or without astigmatism and a stable prescription.
• Are looking for more than standard LASIK, exceptional night vision, or relief from halos/glare with glasses or contacts.
• Have subtle corneal anomalies or asymmetry that traditional LASIK can’t fix.
• Seek “super vision”, such as high-definition clarity for professions requiring visual precision (e.g., pilots, surgeons, photographers).
• Are first-time refractive surgery candidates looking for the most advanced form of LASIK available.

LASIK

LASIK (Laser-Assisted In Situ Keratomileusis) is one of the most widely performed refractive surgeries globally. It reshapes the cornea to improve how light focuses on the retina.

The process is popular for effectively treating myopia (nearsightedness), hyperopia (farsightedness), and astigmatism.

LASIK has undergone multiple refinements over the years, such as bladeless flap creation and wavefront-guided customisation, making it a safer, more accurate, and more personalised alternative.

A 2016 study found that 99.5% of LASIK patients achieved 20/40 vision or better, which is the minimum visual acuity necessary for an unrestricted driver’s license in most parts around the world.

How It Works

The LASIK procedure involves creating a thin corneal flap under topical anaesthesia using either a microkeratome blade (traditional LASIK) or a femtosecond laser (bladeless or “All-Laser LASIK”).

Then, a computer-controlled excimer laser removes corneal tissue, reshapes the underlying stromal tissue according to the patient’s refractive error, and repositions the flap without the need for sutures. The flap adheres naturally to the eye and heals rapidly.

The process is typically completed in 10-15 minutes per eye.

Key Benefits

The most distinct advantage of LASIK is its rapid, painless execution, with minimal discomfort and expedited visual recovery. Other key advantages are explained below:

• LASIK surgery takes just minutes per eye and is performed on an outpatient basis.
• Most LASIK patients notice significantly improved vision within 24 hours, with full stabilisation in a few weeks. Individuals return to work or daily activities within 1-2 days.
• The treatment uses advanced eye-tracking and ablation software, which tailors it to every patient’s unique prescription.
• LASIK platforms incorporate wavefront-guided or topography-integrated technologies, offering enhanced precision and reduced side effects, such as glare and halos.
• LASIK typically involves less irritation and tearing during the healing process, unlike surface procedures like PRK.

Who is it Best Suited For?

LASIK is one of the most versatile and accessible refractive procedures, ideally suited for:

• Adults aged 18 and above with a stable prescription for at least one year.
• Patients with moderate to high myopia, astigmatism, or mild hyperopia.
• Individuals seeking rapid visual recovery with minimal downtime.
• Those with adequate corneal thickness, as thinning may limit eligibility.
• People who prefer a flap-based procedure and are not prone to corneal trauma.
• Patients seeking a widely available, cost-effective, and reliable option.

Trans-Epithelial PRK

Trans-epithelial PRK (TransPRK) represents a modern evolution of the original PRK (Photorefractive Keratectomy) surgery.

It is a no-flap, one-step surface-based laser vision correction technique, i.e., it does not involve cutting the cornea, unlike LASIK or SMILE.

Instead of manually removing the corneal epithelium (as in traditional PRK), TransPRK uses an excimer laser to remove the epithelium and reshape the underlying stroma in a single step.

How It Works

The TransPRK procedure utilises a single-step excimer laser to remove the ~50-micron epithelial layer. It reshapes the underlying stromal layer without the use of mechanical tools or epithelial scraping.

The epithelium vaporises and the corneal surface is corrected based on the patient’s prescription.

Then, a bandage contact lens is applied to protect the eye as the epithelium regenerates naturally over 3-5 days. Vision improves within 1-2 weeks, with final stabilisation occurring over 1-3 months.

Key Benefits

The most significant benefit of TransPRK is its no-flap alcohol-free process, which supports tissue preservation. Here’s a quick overview of some more benefits:

• TransPRK is entirely laser-based and requires no contact with blades, which reduces the risk of infection and flap-related complications.
• This doesn’t involve the use of chemicals, minimising post-operative haze and inflammation. 
• TransPRK is flapless, keeping the corneal structure intact. This is suitable for patients with thin corneas or those at high risk of ectasia.
• Fewer corneal nerves are severed in TransPRK compared to LASIK, resulting in fewer postoperative dry eye symptoms.

Who is it Best Suited For?

Trans-epithelial PRK is the preferred choice for patients with:

• Thin or irregular corneas that are not LASIK candidates.
• High-risk occupations, such as military personnel or contact sports, where corneal flap displacement is a concern.
• Chronic dry eye, as the surgery is less likely to worsen the condition.
• A demand for a flapless, touchless procedure with strong safety margins.
• Low to moderate myopia, hyperopia, or astigmatism and a healthy corneal surface.
• Concern for long-term structural integrity of the eye.

CustomEyes

CustomEyes is an individualised vision correction method that adapts to patients’ unique optical systems. The treatment uses advanced diagnostics, individualised laser programming, and high-speed excimer or femtosecond lasers.

CustomEyes integrates topography-guided (addressing corneal surface irregularities), wavefront-guided (correcting internal optical aberrations), or wavefront-optimised (preserving natural corneal asphericity) techniques depending on clinical need.

It addresses not just refractive errors but also corneal irregularities and internal optical distortions. The procedure enhances overall visual clarity, contrast sensitivity, and night vision.

How It Works

CustomEyes begins with high-resolution, multi-dimensional scans using wavefront aberrometry, corneal topography, and pachymetry. These detect both lower-order (myopia, hyperopia, astigmatism) and higher-order aberrations (coma and spherical aberration).

This data helps create a personalised wavefront-guided, topography-guided, or hybrid treatment plan. Then, AI-assisted algorithms simulate and optimise how light passes through the eye for the best results.

Finally, a high-speed excimer laser reshapes the cornea to correct both refractive errors and internal optical distortions.

Key Benefits

The greatest benefit of CustomEyes is its ability to tailor every aspect of laser correction to the patient’s unique optical system, including flap thickness and ablation depth. Some additional benefits are listed below:

• CustomEyes specifically targets optical distortions, reducing issues such as glare, halos, and starbursts, particularly during nighttime driving.
• This process optimises offers vision better than 6/6, with crisper contrast, improved depth perception, and brighter, more defined vision.
• It works with LASIK, TransPRK, or PRK by enhancing accuracy and results for all procedures.

Who is it Best Suited For?

CustomEyes is best for patients who want advanced vision correction, including those with:

• High visual performance demands (e.g., pilots, surgeons, designers, athletes).
• Irregular astigmatism, decentered corneas, abnormal corneal topography, or mild higher-order aberrations.
• A need for custom-tailored enhancements rather than one-size-fits-all surgery.
• A history of contact lens-induced corneal warpage or previous eye surgery.

SmartLASIK

SmartLASIK (commonly referred to as Femto-LASIK or Bladeless LASIK) is a next-generation, flap-based refractive procedure developed by multiple manufacturers, including Johnson & Johnson, Alcon, and ZEISS. It represents the modern standard of LASIK, replacing the mechanical microkeratome blade with a femtosecond laser for flap creation while retaining the excimer laser for corneal reshaping.

Unlike traditional Microkeratome LASIK, which uses a metal blade to cut the corneal flap, SmartLASIK utilises ultra-fast femtosecond laser pulses to create a uniform, thin, and highly predictable flap. This blade-free approach minimises tissue trauma, reduces the risk of flap irregularities, and offers enhanced safety and precision compared to older mechanical techniques.

How It Works

SmartLASIK is a two-laser, blade-free procedure performed sequentially on the same eye. First, a femtosecond laser (such as the ZEISS VisuMax or Alcon WaveLight FS200) creates a thin, hinged corneal flap using ultra-fast, low-energy pulses, after which the surgeon gently lifts the flap to expose the underlying stroma.

Next, an excimer laser (such as the Alcon EX500 or Schwind AMARIS 1050RS) reshapes the exposed corneal stroma based on the patient’s refractive error, correcting myopia, hyperopia, and astigmatism. Finally, the surgeon repositions the flap, which adheres naturally without sutures.

The entire procedure is guided by advanced eye tracking (including cyclotorsion, iris recognition, and pupil centroid tracking) and may integrate topography-guided or wavefront-optimised ablation for personalised correction.

Key Benefits

The most valued benefit of SmartLASIK is its blade-free, highly predictable flap creation, which offers superior safety and visual outcomes compared to older microkeratome LASIK. Additional procedural benefits of SmartLASIK are listed below:

• Most patients achieve functional vision within a few hours, with many reaching clear vision by the next day. Recovery is faster than surface procedures such as PRK.
• The surgery is virtually painless due to topical anaesthetic drops, with only mild pressure or dryness typically experienced during the first 24 hours.
• Femtosecond lasers produce uniform, thin flaps, reducing complications associated with blade-based techniques.
• Modern thinner flaps preserve more corneal nerves than earlier mechanical techniques.
• SmartLASIK can be combined with advanced guidance systems to correct refractive errors with improved accuracy.
• With decades of clinical use, femtosecond LASIK remains one of the most widely studied and reliable refractive procedures.

Who is it Best Suited For?

SmartLASIK is best suited for patients who are:

• Healthy candidates with adequate corneal thickness are typically suitable for flap-based surgery without significant corneal irregularities.
• Seeking rapid recovery, especially for individuals who want to return to normal activities within 24-48 hours.
• Professionals with demanding schedules, such as those who cannot afford extended downtime.
• Patients with stable refractive errors, including myopia, hyperopia, and astigmatism, depending on clinical suitability.
• Individuals who prefer established technology with a long safety track record and wide availability.
• Patients without significant dry eye disease, who can tolerate the temporary tear reduction associated with flap creation.

Which Refractive Surgery Is Best for You?

The right choice of refractive surgery depends on whether the patient has general needs, special eye concerns (such as thin or irregular corneas), lifestyle demands (such as high-performance professions or sports), a desire for maximum personalisation, or a preference for minimal invasion and quick recovery.

Here’s how different patient profiles influence the choice of the best procedure: 

1. Patients Requiring General Vision Correction

SMILE, LASIK, and SmartLASIK are widely used procedures for correcting common refractive errors such as myopia, hyperopia, and astigmatism for patients with healthy corneas and stable prescriptions.

All three techniques have been proven to provide fast visual recovery and deliver consistent results, reducing or eliminating the need for glasses or contact lenses.

2. Individuals with Thin Corneas

Trans-epithelial PRK, SmartSurf, and EpiContoura are suitable for individuals with a thin cornea because they are flap-free processes and cause minimal stromal ablation.

3. Individuals with Irregular Cornea

Contoura Vision is recommended for correcting refractive errors in people with an irregular cornea. Its topography-guided planning addresses irregular astigmatism and enhances overall visual performance.

4. High-Performance Individuals

WaveLight Plus InnovEyes, SILK, and CLEAR are ideal for individuals who require superior performance, including sharp vision, enhanced contrast sensitivity, accurate depth perception, improved night vision, and minimal visual disturbances.

These procedures offer enhanced optical precision, dynamic mapping, and minimised aberration induction.

5. Patients Seeking Ultra-Personalisation

WaveLight Plus InnovEyes and CustomEyes are suitable for individuals requiring maximal customisation, such as patients with high refractive errors, irregular corneal shapes, or specific occupational visual needs.

Both these procedures can be tailored to the unique anatomical and optical profile of the individual eye.

6. Patients Seeking Minimal Invasion and Fast Recovery

For individuals seeking reduced surgical trauma and faster healing, such as athletes, active professionals, or those prone to dry eye, minimally invasive techniques like SMILE Pro, SILK, and CLEAR are preferred.

What to Consider When Choosing a Procedure?

When choosing a refractive eye procedure, consider factors such as corneal thickness, pupil size, tear film quality, lifestyle, customisation preferences, age, refractive error stability, budget, and the hospital’s availability. Below are the key considerations in detail.

1. Corneal Thickness

The thickness of the cornea determines which procedures are safe and suitable for an individual.

If the cornea is thin, flap-based surgeries like LASIK remove excessive corneal tissue. This can make the cornea unstable, leading to complications like corneal ectasia. Thus, flapless options like SMILE, SILK, CLEAR, SmartSurf, Epicontoura, or TransPRK are generally safer and more appropriate for thin corneas.

On the other hand, if a cornea is thick enough, flap-based surgeries like LASIK or SmartLASIK are safe.

2. Pupil Size

Pupil size affects the quality of night vision after surgery. Larger pupils have a higher risk of halos, glare, and reduced contrast sensitivity at night or in low-light conditions than smaller pupils.

Advanced surgery options, such as WaveLight InnovEyes or CustomEyes, are more suitable for larger pupils.

Individuals with smaller pupils can undergo any of the listed treatments without said complications.

3. Tear Film Quality

Tear film quality impacts comfort and healing after surgery.

Individuals with poor tear film or pre-existing dry eye have an increased risk of post-surgical dryness, especially with flap-based surgeries such as LASIK. Flapless options like SMILE, SILK, CLEAR, SmartSurf, EpiContoura, and TransPRK preserve more corneal nerves and are more comfortable for them.

People with healthy tear film quality can choose any flap-based or flapless surgical procedure.

4. Lifestyle and Activity Levels

The patient’s daily activities and career needs also define the best choice of procedure.

Individuals involved in high-contact or high-impact activities (such as martial arts or army training) are at risk of flap dislodgement. Flapless procedures (SMILE, SILK, CLEAR, SmartSurf, EpiContoura, TransPRK) reduce this risk.

Those aspiring to join the military or outdoor professions must consider flap-free surface treatments like TransPRK, SmartSurf, or EpiContoura, owing to their durability.

Busy professionals or students who require rapid recovery should consider SMILE Pro, LASIK, or SmartLASIK for faster visual recovery and minimal downtime.

5. Customisation Needs

Some individuals require more precise vision than 6/6 visual acuity, improved night vision, or superior contrast sensitivity. In these cases, they require advanced correction procedures, including CustomEyes, Contoura Vision, or WaveLight Plus InnovEyes.

These systems correct refractive error and higher-order aberrations based on the patient’s unique eye type.

Those without such needs can opt for more basic procedures, such as standard LASIK, SMILE, SILK, or CLEAR.

6. Age

Age plays a significant role in determining the speed of healing and the elasticity of eye cells post-operation.

Doctors typically consider patients suitable for all the listed treatments to be between 21 and 40 years old, owing to their fast healing response and stable corneal structure.

Individuals over 40 with presbyopia or the early signs of the same are recommended LASIK, SmartLASIK, or CustomEyes. These accommodate slow healing speed and poor elasticity of eye cells.

7. Stability of Eye Power

Stability in eye power or prescription is necessary for treatment efficiency and long-term results.

A candidate for any of these procedures must have stable eye powers for at least the past 12 months.

Younger patients under 22 years often have fluctuating prescriptions, making them less ideal for any of the surgeries. They are usually advised to wait until stability is confirmed.

8. Budget and Hospital Availability

Not all procedures are equally accessible or affordable. Standard LASIK, SmartLASIK, and PRK are generally more affordable and accessible, i.e., most hospitals offer them.

SMILE, SILK, CLEAR, Contoura Vision, and personalised treatments (InnovEyes, CustomEyes) are expensive but offer superior quality. These are available only at select hospitals due to the specialised equipment required.

Your choice of treatment also depends on your financial capabilities and whether you can access hospitals that offer these treatments.

What is the Best Specs Removal Option in 2026?

In 2026, WaveLight Plus InnovEyes is considered one of the most advanced specs removal options due to its highly personalised treatment approach. It uses detailed eye-mapping and predictive modelling to create customised corrections, allowing more precise treatment of subtle visual imperfections. Many patients experience fast visual recovery, and the technology is designed to account for potential long-term changes in the eye.

However, other procedures such as SMILE, SMILE Pro, CLEAR, Contoura Vision, CustomEyes, SmartLASIK, SmartSurf, and EpiContoura remain effective alternatives. These options may be more suitable for patients with thinner corneas, dry eyes, specific medical needs, or budget considerations.

Ultimately, the best specs removal option in 2026 depends on individual eye health and suitability, determined through a comprehensive evaluation by an experienced eye specialist.

What are the Most Advanced Hospitals for these Surgeries?

The most advanced hospitals for these surgeries are Eye7 Chaudhury Eye Hospital, among private hospitals, and AIIMS and Sankara Nethralaya, among government hospitals. Let’s get familiar with each of them here.

1. Eye7 Eye Hospitals, New Delhi

Eye7 Eye Hospitals are widely recognised as one of Delhi’s premier institutions for refractive eye surgery, with over 35 years of experience. They combine deep expertise with advanced technology in all the mentioned surgeries at their six locations in New Delhi.

The hospital is known for several innovative vision correction techniques and is a pioneer in bladeless surgeries. It is among the first in Delhi to adopt new-generation platforms, such as VisuMax 800 and WaveLight EX500, offering cutting-edge procedures with exceptional precision.

2. AIIMS, New Delhi

AIIMS is a government-run hospital, governed by the Ministry of Health and Family Welfare, in Delhi, that offers most of the listed surgeries except for SILK. Patients receive treatment at a significantly lower cost at AIIMS through the RP Centre for Ophthalmic Sciences. 

The hospital, established in 1956, has a dedicated department equipped with the latest technology for these procedures, ensuring a safe and fast recovery, as well as an exceptional patient experience.

3. Sankara Nethralaya, Chennai

Sankara Nethralaya is a leading not-for-profit eye hospital in Chennai, founded by Dr. S. S. Badrinath. The 1978-established hospital is renowned for its affordable excellence. It serves thousands of patients across India and abroad.

It offers a comprehensive range of refractive eye surgeries, including LASIK, SMILE, Contoura Vision, and wavefront-guided LASIK.

What Core Technology Differentiates WaveLight Plus InnovEyes from Other Vision Correction Platforms?

WaveLight Plus InnovEyes is the world’s first ray-tracing LASIK platform with AI-based planning, tracking light rays across the cornea, lens, pupil, and retina for complete optical correction.

SMILE, SMILE Pro, CLEAR, and SILK are lenticule-based, flapless procedures using aspheric profiles that reshape only the cornea without internal customisation.

Contoura Vision, CustomEyes, and SmartLASIK rely on topography-guided or wavefront-guided LASIK based on Gullstrand’s eye model, offering limited customisation.

SmartSurf and EpiContoura (Streamlight) are trans-epithelial PRK (surface ablation) procedures using non-customised laser profiles without 3D modelling or internal correction.

What are the Differences in Flap and Flapless Techniques across WaveLight Plus InnovEyes and Other Procedures?

WaveLight Plus InnovEyes offers both flap and flapless options, merging the healing benefits of flapless surgery with the precision of full personalisation.

SMILE, SMILE Pro, CLEAR, SILK, SmartSurf, and EpiContoura are exclusively flapless but provide limited or no personalisation in surgical planning.

Contoura Vision, CustomEyes, and SmartLASIK predominantly use flap-based approaches with moderate personalisation and lack future-ready adaptability.

How does WaveLight Plus InnovEyes Enable Predictive Surgery and Future Readiness versus Other Systems?

WaveLight Plus InnovEyes delivers predictive outcome simulations through its EyeVatar system, adapting to future healing, epithelial remodelling, and biomechanical shifts for stable, long-term vision.

All other technologies lack predictive modelling and have no built-in adaptation for postoperative healing or structural changes, risking gradual quality decline over time.

What are the Costs of WaveLight Plus InnovEyes and Alternative Vision Correction Technologies in 2026?

The following table presents a comparative overview of the approximate costs for WaveLight Plus InnovEyes and alternative vision correction procedures in India in 2026.

Technology	Approximate Cost of Both Eyes
WaveLight Plus InnovEyes	₹ 1,50,000
SMILE / SMILE Pro / CLEAR / SILK	₹ 95,000 – ₹ 1,20,000
Contoura Vision / CustomEyes / SmartLASIK	₹ 85,000 – ₹ 1,10,000
SmartSurf / EpiContoura	₹ 70,000 – ₹ 95,000
LASIK / TransPRK	₹ 50,000 – ₹ 1,50,000

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Resources

1. https://www.sciencedirect.com/science/article/abs/pii/S0886335018310034
2. https://pubmed.ncbi.nlm.nih.gov/27531300/