Medical fitness is an important part of RRB recruitment, holding equal importance to clearing the CBT and skill tests. For railway operations, especially in safety-critical posts such as Assistant Loco Pilot (ALP), Loco Pilot, and Guard, visual precision directly impacts public safety, operational accuracy, and quick situational response. Even a slight compromise in vision can endanger lives or disrupt high-speed rail systems, making visual standards a vital eligibility factor.
To ensure optimal safety and performance, the Indian Railways classifies all posts into distinct medical categories, i.e., A-1, A-2, A-3, B-1, B-2, C-1, and C-2. Each has specific eyesight requirements based on the visual demands of the job. These categories define acceptable limits for distant vision, near vision, glasses acceptability, lens power limits, and other vision parameters, ensuring that every employee entrusted with operational or technical responsibilities meets the necessary visual fitness standards.
This article aims to share the latest eyesight requirements in the top RRB recruitment exams so aspirants can prepare accordingly.
It covers the common RRB recruitment eyesight requirements, providing a concise chart that summarises different medical vision requirements across A-1 to C-2 medical categories, as well as post-wise visual thresholds for ALP, NTPC, Group D, and Technician roles. The guide also shares information on where to get eyes tested before RRB exams, eligibility for LASIK and other eye surgeries, acceptance for colour blindness, next steps after failing eyesight exams, and tips for clearing the eyesight medicals.
What are the Eyesight Requirements in RRB Recruitment?
The eyesight requirements for RRB recruitments vary depending on the level of visual precision needed for a post. In general, candidates are eligible if they have distant and near vision, as well as lens power, within the respective limits.
Every candidate must undergo a comprehensive medical examination conducted by authorized railway medical officers to ensure they meet the prescribed standards for their respective posts.
These standards are categorized into different tiers (A, B, and C) based on the safety sensitivity of the job. Safety-critical posts, such as Loco Pilots, Guards, and Station Masters, require excellent distant and colour vision, as even minor visual errors can compromise operational safety. In contrast, clerical and administrative roles have comparatively relaxed standards, where functional vision for reading and computer use is sufficient.
All the standards require candidates to undergo three main assessments: distant vision for long-range sight work, near vision for reading and close work, and colour vision to identify colour-coded signals and other details. Together, these tests ensure that candidates can identify signals, read displays, and perform duties safely and efficiently across different railway environments.
RRB Medical Standards – A-1, A-2, B-1, B-2, C-1, C-2 Explained
RRB has different medical standards for vision, including A-1, A-2, A-3, B-1, B-2, C-1, and C-2. Given below is a table explaining each one of them.
| Medical Standards | Distant Vision | Near Vision (Sn) | Glasses | Maximum Lens Power | Additional Tests to Pass | LASIK and Other Eye Surgery Acceptance |
|---|---|---|---|---|---|---|
| A-1 | 6/6, 6/6 | 0.6,0.6 | Without Fogging test required | +2D | Colour Vision Binocular Vision Night Vision Mesopic Vision Field of Vision | Not Accepted |
| A-2 | 6/9, 6/9 | 0.6,0.6 | Without No fogging test required | None Mentioned | Colour Vision Binocular Vision Night Vision Myopic Vision | Not Accepted |
| A-3 | 6/9, 6/9 | 0.6,0.6 | With or Without | 2D | Colour Vision Binocular Vision Night Vision Mesopic Vision | Not Accepted |
| B-1 | 6/9, 6/12 | 0.6,0.6 | With or Without | 4D | Colour Vision Binocular Vision Night Vision Mesopic Vision | Accepted |
| B-2 | 6/9, 6/12 | 0.6,0.6 | With or Without | 4D | Binocular Vision Field of Vision | Accepted |
| C-1 | 6/12, 6/18 | 0.6,0.6 | With or Without | None Mentioned | None Mentioned | Accepted |
| C-2 | 6/12, nil | 0.6 combined | With or Without | None Mentioned | None Mentioned | Accepted |
Eye Sight Requirements for Different RRB Exams
Different RRB exams have different eyesight requirements, and the most popular ones are listed here.
RRB ALP (Assistant Loco Pilot)
Candidates must meet all the following A-1 eyesight medical standards to be eligible for RRB Assistant Loco Pilot roles:
- A minimum distant vision of 6/6 in both eyes without glasses is necessary.
- The candidate must undergo a fogging test and must not have a lens power of +2 dioptres.
- Near vision must be 0.6 in each eye without glasses.
- The candidate must pass tests for colour vision, binocular vision, mesopic vision, night vision, and field of vision.
- Individuals who have undergone LASIK surgery are not eligible for this position.
RRB NTPC (Non-Technical Popular Categories)
RRB NTPC exams are held distinctly for graduates and undergraduates. The medical requirements for each are listed below.
RRB NTPC Graduate
RRB NTPC Graduate requires the following medical categories and eyesight standards:
- A-2: A minimum of 6/9 distant vision in both eyes without glasses, and no fogging test is required. Near vision must be 0.6 in each eye without glasses. The candidate must pass tests for colour vision, binocular vision, night vision, and myopic vision.
- B-2: Candidates are eligible if they have a minimum distant vision of 6/9 in one eye and 6/12 in the other with or without glasses, where the lens power is within 4 dioptres. Near vision is acceptable if within 0.6 for each eye with or without glasses while reading or doing other close-range work. Passing grades are required in the field of vision and binocular vision tests.
- C-2: Candidates need a minimum distant vision of 6/12 in one eye and nil in the other, and a combined near vision of 0.6 in both eyes for close work, with or without glasses.
RRB NTPC Undergraduate
RRB NTPC Undergraduate demands these medical categories and respective vision standards:
- A-3: Candidates must have a 6/9 distant vision in each eye with or without glasses, where the lens power is up to 2 dioptres. Near vision of 0.6 in each eye, with or without glasses, is the minimum requirement. Good colour vision, binocular vision, night vision, and myopic vision are a must.
- B-2: A distance vision of 6/9 in one eye and 6/12 in the other, uncorrected or corrected with glasses. Lens power must not exceed 4 dioptres. Near vision must be at least 0.6 in each eye, with or without corrective lenses.
- C-2: These roles demand 6/12 distant vision in one eye and nil in the other, and combined near vision of 0.6 in both. The limits must be met with or without glasses.
RRB Group D
The below-mentioned medical categories and eyesight standards work for RRB Group D exams:
- A-2: Candidates must possess a minimum uncorrected distant vision of 6/9 in each eye and a near vision of 0.6 in each eye. Additionally, they must successfully pass tests for colour, binocular, night, mesopic, and myopic vision.
- A-3: Visual acuity must meet a minimum of 6/9 for distance and 0.6 for near vision in each eye, with or without corrective lenses (up to 2 dioptres). Candidates must demonstrate normal colour perception, binocular vision, night vision, mesopic vision, and myopic vision.
- B-1: Unaided or corrected visual acuity must meet a minimum of 6/9 in one eye and 6/12 in the other for distance, and 0.6 in each eye for near tasks. Corrective lenses are permitted up to a maximum power of ±4 dioptres. A passing grade is mandatory in assessments of colour perception, binocular function, mesopic vision, and night vision.
- B-2: Candidates must demonstrate corrected or uncorrected visual acuity of at least 6/9 in one eye and 6/12 in the other for distance, and 0.6 in each eye for near vision for close-range work. Corrective lenses must not exceed 4 dioptres. Normal binocular vision is also mandatory.
- C-1: The minimum required visual acuity, corrected or uncorrected, is 6/12 in one eye and 6/18 in the other for distance, and 0.6 in each eye for near vision for close-range tasks.
- C-2: A distant vision of 6/12 in one eye and nil in the other, and a combined near vision of 0.6 with or without glasses is necessary.
Technician Posts
The different RRB technician posts require the following medical categories and vision standards:
- A-3: 6/9 distant vision in each eye is mandatory with or without glasses, but lens power should be within 2 dioptres. Near vision must be 0.6 for each with or without glasses. Candidate must pass the colour vision, binocular vision, mesopic vision, and night vision tests.
- B-1: Distant vision of 6/9 in one eye and 6/12 in the other eye is necessary with or without glasses. Lens power must be within 4 dioptres. Near vision of 0.6 in each eye, with or without glasses, is necessary for reading and other close-range tasks. A passing grade in colour vision, binocular vision, mesopic vision, and night vision is needed.
- B-2: Candidate must have distant vision of 6/9 in one eye and 6/12 in the other with or without glasses, with maximum lens power being 4 dioptres. A near vision of 0.6 in each eye with or without eyeglasses is required. They only need to have good binocular vision.
- C-1: Minimum distant vision of 6/12 in one eye and 6/18 in the other with or without glasses. The minimum near vision requirement is 0.6 in each eye, with or without corrective lenses.
Where to Visit to Test Your Eyes before RRB Exams?
Candidates appearing for Railway Recruitment Board (RRB) medical tests should get their eyes examined at a recognized ophthalmic centre that understands railway vision standards. The evaluation should include unaided and corrected visual acuity, colour vision (Ishihara test), field of vision, and refraction assessment as per RRB’s A-1 to C-2 medical classifications.
Reputed eye care centres like Eye7 Eye Hospitals in Delhi are among the preferred choices for candidates preparing for RRB medicals. This is because these facilities offer comprehensive pre-employment eye screenings aligned with Indian Railways’ medical criteria, enabling aspirants to identify and correct vision issues well before their official examination.
Is Wearing Glasses Allowed in the RRB Medical Test?
Wearing glasses is permitted in some Railway Recruitment Board (RRB) medical examinations for A-3, B-1, B-2, C-1, and C-2 categories, provided the corrected vision (with spectacles) meets the prescribed standards for the respective category. Meanwhile, RRB does not allow spectacles for the A-1 and A-2 categories.
Note: RRB only accepts plain glasses for correction. Photochromatic or colored lenses in spectacles and contact lenses are not allowed during the medicals.
Is LASIK or Eye Surgery Allowed in RRB Medical?
LASIK or other refractive eye surgeries are not allowed for roles requiring A-1, A-2, and A-3 medical standards, but allowed for B-1, B-2, C-1, and C-2 categories, only if candidates meet the following criteria:
- A minimum of one year must have passed since the procedure was performed.
- The candidate must have no complications relevant to the surgery.
- They must provide a medical certificate from the surgical institution, signed by the respective surgeon, confirming that there are no post-operative complications and a stable, satisfactory outcome for at least one year.
- Post-surgical pachymetry must confirm a residual corneal thickness of no less than 425 microns.
- A current examination must reveal a normal fundus and no evidence of any progressive eye disease.
Candidates who have undergone LASIK must always carry medical proof of operation.
Is Colour Blindness Allowed in RRB Medical?
Colour blindness is not allowed in most categories of the Railway Recruitment Board (RRB) medical examination, particularly for technical and safety-critical positions.
The Indian Railways enforces strict colour vision standards for A-1, A-2, B-1, and B-1 categories because accurate colour perception is essential for operational safety and signal recognition.
The RRB medical board tests colour vision using Ishihara plates. In this, candidates are shown plates printed with coloured dots forming numbers or patterns, which they must identify within a few seconds. Those with normal colour vision can read them easily, while individuals with red-green deficiencies struggle to distinguish the figures. The test typically uses 14 to 38 plates under standard lighting, making it a quick and reliable method for assessing colour perception.
Colour blindness may be allowed in certain non-safety roles, including C-1 and C-2 categories. The final decision depends on the medical board. It’s wise to check the latest notice thoroughly.
What Happens if You Fail the Eye Sight Test in RRB?
If a candidate fails the eyesight test in the RRB medical examination, they are declared “Unfit” for the category applied. Since vision standards in railways are safety-critical, especially for A1 and B1 categories such as Loco Pilot, Assistant Loco Pilot, and Guard, failure usually results in disqualification from those posts.
However, candidates may still be considered for lower medical categories (such as B2 or C1) if the recruitment rules allow and vacancies are available.
In cases of suspected error, a review or appeal medical board can sometimes be requested, but the final decision of the Railway Medical Authority is binding.
If visual failure is caused by temporary issues, i.e., eye infection, fatigue, or uncorrected refractive error, the candidate may be advised to seek treatment and reappear after a specified period, at the board’s discretion.
For irreversible or high-risk conditions, such as advanced colour blindness, retinal disease, or severe refractive error beyond permissible limits, the candidate is permanently declared unfit for railway service.
Tips for Clearing the RRB Eye Sight Test
Some tips for passing the RRB eyesight test include improving eye health through a balanced diet, reducing screen strain, getting a comprehensive eye check-up, avoiding decongestant eye drops and contact lenses, practising taking the Ishihara eye test, and considering corrective procedures if applicable. Here’s a brief expansion of each:
1. Maintain Eye Health Naturally: Adopt a diet rich in Vitamin A, lutein, and antioxidants (such as carrots, spinach, eggs, and citrus fruits) and avoid smoking. Proper hydration and eye-friendly habits help sustain visual clarity.
2. Avoid Excessive Screen Strain Before the Test: Prolonged use of digital devices can cause temporary blurred vision or eye fatigue. Take regular breaks, practice the 20-20-20 rule (look 20 feet away for 20 seconds every 20 minutes), and ensure adequate sleep before your medicals.
3. Get a Comprehensive Eye Check-Up Early: Visit a reputed eye hospital for a full ophthalmic evaluation. Ensure you test for distant and near vision, colour vision, squint, and fundus health. Early detection of issues like refractive errors or mild colour deficiency allows time for correction or management before the exam.
4. Refrain from Using Decongestant Eye Drops or Contact Lenses: Artificial enhancers such as decongestant drops or cosmetic lenses can temporarily alter eye parameters and may lead to disqualification. Avoid using these for a few days before the test. Appear for the test with your natural or prescribed vision only.
5. Practice the Ishihara Test for Colour Vision: Colour blindness is a major disqualifier for the A-1 and A-2 categories. Familiarize yourself with Ishihara plates to understand how the test is conducted. If you suspect even mild colour deficiency, consult an ophthalmologist as soon as possible.6. Consider Corrective Procedures Only if Eligible: If you have undergone LASIK or PRK, ensure it meets Railway Medical Board criteria, typically requiring surgery after 20 years of age, stable refraction for at least 6 months, and normal corneal thickness.
Resources
- https://rrbsecunderabad.gov.in/wp-content/uploads/2025/04/Final_CEN_01-2025_ALP_English.pdf
- https://rrbsecunderabad.gov.in/wp-content/uploads/2025/10/Final-CEN-06-2025-21-10-2025-Publish.pdf
- https://www.rrbchennai.gov.in/downloads/CEN-07-2025-NTPC-UnderGraduate-English.pdf
- https://www.careerpower.in/blog/wp-content/uploads/2025/01/22114739/RRB-Group-D-Notification-2025.pdf
- https://rrbsecunderabad.gov.in/wp-content/uploads/2025/06/Detailed-CEN-2-2025_-Technician-Categories.pdf