Eyesight Requirements for Merchant Navy India 2026: What You Must Know Before It’s Too Late

If you’re planning to join the Merchant Navy but worried about your eyesight, this article will give you the exact standards, the consequences if your vision changes, and what steps you can actually take. This is the most common anxiety among young aspirants — and most coaching institutes never explain it properly.

Let’s fix that.

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The DG Shipping Vision Standard: What Is 6/6 and 6/12?

The Directorate General of Shipping (DGS) sets mandatory medical fitness standards for all seafarers under the Merchant Shipping Medical Examination Rules. Vision is tested in terms of Snellen acuity:

• 6/6 means you can read from 6 metres what a person with perfect vision reads at 6 metres.
• 6/12 means you need to be 6 metres away to read what a normal person reads at 12 metres — roughly half the acuity.

The DGS ENG-1 medical examination (or equivalent Indian fitness certificate) assesses:

• Visual acuity (unaided and aided)
• Colour vision (Ishihara plates + lantern test)
• Field of vision
• Contrast sensitivity

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Department-Wise Vision Requirements

This is where most aspirants get confused. The standards differ between deck and engine departments.

Deck Officers (Navigating Officers — 2/O, 3/O, Chief Mate, Master)

These officers are directly responsible for navigation, collision avoidance, and lookout duties. The standards are strict:

• Unaided vision: Not less than 6/6 in the better eye and 6/24 in the worse eye — though individual company standards may be stricter.
• With correction: Many companies accept corrected vision of 6/6 but they may limit you in operational roles.
• Colour vision: Must pass both Ishihara plates AND lantern test. This is a hard requirement. Colour blind candidates cannot join the deck department.

Engine Officers (Marine Engineers — 4th Engineer, 3/E, 2/E, Chief Engineer)

Requirements are less strict because navigation watch duties are not primary:

• Unaided vision: 6/12 in the better eye is generally acceptable.
• Corrected vision: Must achieve 6/6 with spectacles or contact lenses.
• Colour vision: Ishihara test required but colour deficiency is not always disqualifying for engineers — a lantern test may be substituted.

GP Ratings, TME, Saloon Rating

• Standard is generally 6/12 unaided, correctable to 6/6.
• Company-specific policies apply.

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The 6/12 Eyesight at Age 19: Should You Worry?

If you currently have 6/12 vision in one or both eyes and are planning marine engineering, here is the honest answer:

You are currently within the acceptable range for the engine department. A unaided vision of 6/12 will pass the medical for marine engineering.

However, the real concern raised by many young aspirants is: “My myopia developed after 18 and is still progressing. What if it worsens before my final year?”

This is a legitimate concern. Here’s what happens:

1. Pre-sea medical: You will undergo a DGS-approved medical at an authorised Medical Examiner (ME) before enrolment. If your vision at that point is within limits, you are cleared.
2. Pre-joining medical: Every time you sign on a ship, you need a fresh fitness certificate. If your vision has deteriorated beyond acceptable limits by then, you will be declared unfit for that specific voyage.
3. Mid-career deterioration: Officers whose vision worsens during their career have been declared medically unfit. This is not theoretical — it happens.

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Myopia Progression After 18: What the Data Says

You mentioned your myopia developed after 18 and is still progressing. This is called late-onset myopia, which is less common than childhood myopia. In most cases, progression stabilises by the mid-20s. However, if it is progressing rapidly, a proper optometric assessment is essential before you commit to a 4-year degree course.

Things to assess:

• Rate of change per year (get your past prescriptions compared)
• Axial length measurement (high axial myopia above -6D carries risk of retinal issues)
• Possibility of stabilisation with orthokeratology or atropine therapy under specialist guidance

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Lasik: When Can You Do It, and Will It Help?

Lasik corrective surgery is accepted by most shipping companies and DGS medical examiners, provided:

1. Surgery was done at least 6–12 months prior to the medical examination (time varies by medical examiner policy and company).
2. Final visual acuity post-surgery meets the required standard.
3. There are no residual complications (halos, dry eye affecting performance, etc.).
4. Some companies require a minimum corneal thickness retained post-surgery.

You mentioned Lasik may not be possible due to ongoing myopia. That is correct — Lasik requires stable refraction for at least 1–2 years before it can be safely performed. Rushing into surgery on an unstable eye can worsen outcomes.

Alternatives that may be considered:

• PRK (Photorefractive Keratectomy): Slightly different procedure, similar eligibility requirements.
• ICL (Implantable Collamer Lens): For high myopia where corneal thickness limits Lasik. Increasingly accepted, but verify with DGS-approved MEs beforehand.

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What Happens at the Final Year Medical Before Placement?

This is the critical question. If your vision has worsened beyond 6/12 unaided (or beyond the company’s accepted threshold) by the time of your pre-joining medical in your final year:

• The ME will note the deterioration.
• If corrected vision still meets the 6/6 standard and company policy permits spectacles at sea, you may still be cleared.
• If uncorrected vision has crossed the threshold and the company does not accept correction, you may be deferred or found unfit.

Companies vary significantly here. Some major shipping companies (e.g., Anglo-Eastern, Bernhard Schulte, Fleet Management) accept officers with corrected vision as long as functional performance is not impaired. Others have stricter uncorrected vision policies — particularly for deck officers.

The practical advice: Before completing your GME/DNS admission, contact 2–3 RPSL companies directly and ask for their vision policy in writing. This takes 15 minutes and can save you 4 years of misdirected effort.

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Colour Vision: The Harder Wall

Many aspirants focus on myopia and overlook colour vision. Colour blindness is a career-ending condition for deck officers. It cannot be corrected by surgery or glasses. If you have any colour vision deficiency, do the Ishihara test immediately before investing in a pre-sea course.

For engine officers, mild colour deficiency may still allow a career if you can pass the Farnsworth Lantern Test or similar functional assessment. Get this assessed early.

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Practical Action Plan

If you are currently at 6/12 eyesight and concerned:

1. Get a full optometric workup now — axial length, rate of progression over past 2 years, corneal thickness.
2. Get a preliminary check at a DGS-approved medical examiner — off the record, just to understand where you stand.
3. Confirm company vision policies before committing to a course.
4. Do not self-medicate or rush Lasik — unstable myopia operated early can result in over-correction or regression.
5. Consider engine stream over deck if vision is a borderline concern — the standards are more forgiving.

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Frequently Asked Questions

Q: Can I join Merchant Navy with 6/12 eyesight? A: Yes, 6/12 unaided vision is generally acceptable for the engine department. Deck officers typically need better unaided acuity. Corrected vision to 6/6 is usually sufficient with spectacles.

Q: Will my eyesight get checked during pre-sea training? A: Yes. You undergo a DGS-approved medical examination before enrollment in any pre-sea training program. Your vision is assessed at that point.

Q: Is Lasik accepted in Merchant Navy? A: Yes, most companies accept Lasik-corrected vision provided surgery is stable for at least 6–12 months prior to medical and final acuity meets required standards.

Q: What if I become colour blind? A: Colour blindness disqualifies you from deck officer roles. Engine roles may still be accessible depending on the type and severity of colour deficiency.

Q: Can I join if my power is -4D or more? A: Power (dioptres) alone is not the medical standard — Snellen acuity is. However, high myopia (above -6D) carries additional risk of retinal complications, which medical examiners take seriously. Get a retinal evaluation.

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Conclusion

Eyesight anxiety is real, but most of it comes from lack of correct information. The DGS standards exist to ensure you can do your job safely at sea — not to arbitrarily exclude people. If your vision is borderline, get a proper evaluation, understand your department options, and make an informed choice.

The Merchant Navy does not need blurred decisions. Neither do you.

Have a specific vision-related question about your eligibility? Chat with SailorGPT — India’s first AI mentor for seafarers. Get an honest answer based on your exact numbers.

Or WhatsApp us directly: +91 99581 10235

— Sailor Success Team