LASIK Complications: What Patients Should Know

LASIK has an excellent safety record and a high patient satisfaction rate, but like any surgical procedure, it carries potential risks and complications. Most side effects are mild and temporary, while serious complications are uncommon when surgery is performed on carefully selected patients by experienced surgeons. Understanding the possible risks helps patients make informed decisions and recognize when to seek medical advice.

Temporary Side Effects Are Common

Most patients experience short-term symptoms during the healing process.

Common temporary effects:

• Dry eyes
• Blurred or fluctuating vision
• Light sensitivity
• Halos or glare around lights at night
• Mild discomfort or a gritty sensation

These symptoms usually improve within a few weeks to months.

Dry Eye Syndrome

Dry eye is the most frequently reported complication after LASIK.

Symptoms include:

• Burning or stinging eyes
• Feeling like something is in the eye
• Excessive tearing followed by dryness
• Blurred vision that improves after blinking

Most cases respond well to lubricating eye drops and gradually improve as the corneal nerves heal.

Glare, Halos, and Night Vision Problems

Some patients notice changes in night vision during recovery.

Possible symptoms:

• Halos around headlights or streetlights
• Increased glare in dark environments
• Starbursts around bright lights
• Reduced contrast sensitivity at night

These effects often lessen over the first few months.

Under-Correction or Over-Correction

Occasionally, the laser may not achieve the exact intended correction.

Possible outcomes:

• Small remaining prescription requiring glasses for certain activities
• Vision corrected slightly beyond the target
• Need for an enhancement procedure after healing is complete

Enhancements are only considered once vision has fully stabilized.

Flap-Related Complications

LASIK involves creating a thin corneal flap, which can rarely lead to complications.

Potential issues:

• Flap wrinkles or displacement
• Delayed flap healing
• Inflammation beneath the flap

These complications are uncommon and are usually treatable when identified early.

Infection and Inflammation

Serious infections after LASIK are rare but require immediate attention.

Warning signs include:

• Increasing eye pain
• Worsening redness
• Thick discharge
• Sudden decrease in vision

Prompt treatment is essential to protect vision.

Corneal Ectasia

Corneal ectasia is one of the rarest but most serious complications.

It occurs when:

• The cornea becomes progressively thinner and weaker
• Vision gradually worsens over time
• Additional treatment such as corneal cross-linking or specialty contact lenses may be required

Modern screening has made this complication much less common.

How to Reduce the Risk of Complications

Patients can lower their risk by:

• Choosing an experienced refractive surgeon
• Completing a comprehensive pre-operative eye examination
• Following all post-operative instructions carefully
• Using prescribed medications exactly as directed
• Avoiding eye rubbing during recovery
• Attending all scheduled follow-up appointments

Proper patient selection is one of the most important factors in achieving a safe outcome.

When to Contact Your Surgeon

Seek medical attention immediately if you experience:

• Severe or increasing eye pain
• Sudden loss of vision
• Persistent or worsening redness
• Thick discharge from the eye
• New flashes of light or a curtain-like shadow in your vision

Early treatment can prevent many complications from becoming more serious.

Final thoughts

LASIK is one of the safest elective surgical procedures available, and serious complications are uncommon with modern technology and careful patient screening. Most patients experience only temporary side effects such as dryness or mild visual fluctuations that improve during recovery. Understanding the potential risks, choosing a qualified surgeon, and following post-operative care instructions are the best ways to achieve a successful, long-lasting result.