Is LASIK Surgery Safe? Risks, Success Rates & What Indian Patients Should Know

How Safe is LASIK in 2026?

LASIK is one of the most widely studied elective procedures. Published studies generally report that most suitable candidates achieve good uncorrected vision and that serious complications are uncommon. Outcomes depend on your eyes, your prescription and careful screening, and no result can be guaranteed.

Published research also notes that long-term contact lens wear carries its own risk of serious eye infection (microbial keratitis), which is worth weighing when comparing options.

What Makes Modern LASIK Safer Than Ever

Today's LASIK is dramatically safer than the procedures of even a decade ago:

• Bladeless femtosecond lasers create flaps with micron-level precision
• Topography-guided customisation (Contoura) corrects the unique shape of your cornea
• Wavefront analysis detects higher-order aberrations invisible to standard tests
• Eye tracking at over 1,000 Hz follows even tiny involuntary eye movements
• Stricter screening identifies unsuitable candidates before surgery

Commonly used platforms in India include FDA and CE-approved lasers such as Schwind, Alcon WaveLight and Zeiss VisuMax.

The Real Risks (Honest List)

Every surgery carries some risk. The most common LASIK side effects:

• Dry eyes (most common): Usually temporary, often settling within 3-6 months with lubricating drops
• Glare, halos, starbursts at night: Usually settles within 1-3 months as the brain adapts
• Under-correction or over-correction: A small proportion of patients may need an enhancement
• Flap-related issues (with traditional LASIK): Wrinkles, dislocation — extremely rare with bladeless techniques
• Regression: Slow drift back toward the original prescription, possible in high prescriptions

Serious complications like infection, ectasia (corneal weakening), or permanent vision loss are rare but possible, which is why thorough screening matters.

Long-Term Safety

LASIK has now been performed for over 25 years. Long-term studies show:

• Stability: Results are generally stable for adults with a stable prescription before surgery
• No increased cataract risk later in life
• No interference with future cataract surgery
• Compatible with aging changes — presbyopia (near-vision loss after 40) develops the same way it would have without LASIK

The 'will my vision get worse later?' fear is largely unfounded for stable adult prescriptions.

How to Choose a Safe LASIK Centre in India

Safety is overwhelmingly determined by the centre and surgeon — not the technology brand. Look for:

• A qualified, registered ophthalmologist with specific refractive surgery training
• FDA/CE-approved laser platforms under 5 years old
• Comprehensive pre-op screening (45+ minutes minimum, multiple scans)
• Willingness to decline you if you're not a candidate (a major safety signal)
• Transparent post-op care protocol with at least 4 follow-ups
• Membership in AIOS (All India Ophthalmological Society)
• Clear written information on risks, costs and follow-up

Is Laser Eye Surgery Dangerous?

No — for a properly screened patient treated at a well-run centre, laser eye surgery is a low-risk procedure, but it is still surgery and it is not risk-free. The danger is concentrated in a few situations that good screening is designed to catch:

• A cornea that is too thin or weak — the main risk factor for ectasia (progressive bulging of the cornea). Topography and pachymetry scans are used to spot this before surgery.
• Undetected keratoconus — an early, hidden form of corneal weakening. This is why a centre should never skip detailed corneal scans.
• Significant dry eye that has not been treated — surgery can make it worse.
• An unstable prescription — leads to disappointing results rather than danger, but it is a common cause of regret.
• Poor aftercare — rubbing the eyes, skipping antibiotic drops or getting contaminated water in the eye raises the risk of infection and flap problems.

In other words, most of the risk is decided before the laser is switched on: by who is treated, and how carefully.

Can LASIK Make You Go Blind?

Going blind from LASIK is extremely rare. LASIK works only on the front surface of the eye — the cornea — and does not touch the retina, optic nerve or the inside of the eye.

The rare complications that can seriously reduce vision are:

• Severe infection (infectious keratitis) — rare, and usually treatable with intensive drops if caught early
• Corneal ectasia — the cornea gradually weakens and bulges; usually managed with corneal cross-linking, special contact lenses and, very rarely, a corneal transplant
• Serious flap complications — mostly linked to older blade-based techniques or significant eye injury

Even in these rare cases, the usual outcome is reduced or distorted vision that needs further treatment, not total blindness. The key protective steps are careful screening, attending every follow-up, and contacting your centre immediately if you notice warning signs (listed below).

Can LASIK Fail? What 'Failure' Actually Means

LASIK rarely fails in the sense of causing harm, but it does not always give the exact result planned. When people talk about LASIK failing, they usually mean one of these:

• Under-correction or over-correction — the eye heals slightly differently than predicted, leaving a small prescription. This is often fixable with an enhancement.
• Regression — part of the original prescription returns over months or years, more often with high or plus-power prescriptions.
• Persistent side effects — dry eye, glare or halos that last longer than the usual few months.
• Unmet expectations — for example, a patient over 40 who expected to read without glasses. This is a counselling failure, not a surgical one.

Most of these can be improved, and a good pre-surgery discussion should tell you which are most likely for your eyes. For more on longevity and second treatments, see our guide to whether LASIK lasts forever.

Can LASIK Complications Occur Years Later?

Most LASIK complications appear in the first days to months, but a few can show up years later. The ones to know about are:

• Late ectasia — corneal weakening can, rarely, develop months or even years after surgery. Regular check-ups pick it up early, when cross-linking can stabilise it.
• Flap displacement after injury — the LASIK flap heals well but never becomes quite as strong as untouched cornea, so a hard, direct blow to the eye (sports, accidents) can dislodge it even years later. Protective eyewear for contact sports is sensible.
• Regression or prescription drift — slow, usually mild, and often correctable.
• Long-term dry eye — uncommon, but some people continue to need lubricating drops.

Two things that are often blamed on LASIK but are not caused by it: presbyopia (near-vision loss after 40) and cataract. Both happen with age regardless. Do tell any future eye doctor you had LASIK — it affects eye-pressure readings for glaucoma and lens calculations for cataract surgery.

What Are the Disadvantages of LASIK?

LASIK has real advantages, but it also has disadvantages you should weigh honestly:

• It cannot be reversed — removed corneal tissue does not grow back.
• It does not prevent presbyopia — most people still need reading glasses after about 40-45.
• Temporary side effects are common — dryness, glare and halos in the first weeks to months.
• Not everyone is suitable — thin corneas, very high prescriptions, keratoconus, uncontrolled diabetes, pregnancy and some other conditions rule people out or point to other procedures.
• The flap is a permanent weak point — relevant for people in contact sports or high-impact jobs; flapless options such as SMILE or surface ablation may suit them better.
• It is an upfront cost — usually not covered by insurance (see our cost and insurance guides).
• Some careers have rules — certain defence, police and aviation roles have specific requirements about refractive surgery; check them before booking.
• Results are not guaranteed — a small residual prescription or an enhancement is always possible.

Warning Signs After LASIK That Need Urgent Attention

Contact your centre the same day — do not wait for your next appointment — if you notice any of these after LASIK:

• Worsening pain rather than gradually improving comfort
• Vision that gets worse instead of better, especially after the first couple of days
• Increasing redness, discharge or a white spot on the eye
• Sudden onset of flashing lights, a shower of new floaters or a curtain over your vision
• Any injury to the eye after surgery

Mild grittiness, watering, light sensitivity and fluctuating vision in the first days are normal. Anything that is getting worse is not.