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The Most Feared Complication After LASIK
And how modern techniques prevent it
Humans worry — it’s a survival instinct.
But when it comes to this particular concern, I want to help put your mind at ease.
Based on questions I get online, in consults, and even from friends, most people know refractive surgery is safe, millions of people do it every year, and that it’s a very quick and virtually painless process.
But sometimes, the fear of a complication known as keratectasia makes them hesitate.
What Exactly Is Keratectasia
Keratectasia —corneal ectasia — is a progressive thinning and bulging of the cornea that can occur months or even years after surgery.
It is where the cornea slowly loses structural stability and begins to protrude forward. Vision becomes distorted, irregular, and harder to correct with glasses.
This used to be one of the greatest concerns with LASIK. Not because it was common, but because when it happened, it had a significant impact on the daily life of the individual.
Why It Happens
The cornea is made up of 3 layers:
- The top layer is thin and protective.






