Can LASIK cause corneal ectasia?
Ectasia is a rare complication of corneal refractive surgery, occurring in just 0.04% to 0.6% of procedures. One large study found that 96% of cases of ectasia occurred as a result of LASIK and 4% as a result of PRK.
Is corneal ectasia progressive?
Corneal ectasia signs and symptoms are progressive as the cornea adopts a bulging shape. The most commonly reported are: Inability to fully correct vision to 20/20 with contacts or glasses. Shadows or ghosting figures in the visual field.
How is post Lasik ectasia diagnosed?
Post-LASIK ectasia is considered in patients who developed increasing myopia, with or without increasing astigmatism, loss of uncorrected visual acuity, often loss of best-corrected visual acuity, with keratometric steepening, with or without central and paracentral corneal thinning, and topographic evidence of …
What is Post LASIK corneal ectasia?
Post-refractive surgery ectasia is a loss of corneal integrity leading to corneal warpage that often resembles keratoconus. It is more likely to occur following LASIK, radial keratotomy (RK), or astigmatic keratotomy (AK) surgery.
What is corneal ectasia after LASIK?
What is Ectatic?
Noun. 1. ectasia – dilatation or distension of a hollow organ. ectasis. dilatation, distention, distension – the state of being stretched beyond normal dimensions.
What does corneal ectasia feel like?
Corneal Ectasia Symptoms include dry eyes, blurred vision, and an increase in the symptoms of myopia. Post-LASIK can also be a cause for Corneal Ectasia symptoms like distorted vision and thinning of the cornea. Keratoconus is a progressive state of Corneal Ectasia, which can even lead to a cone-shaped cornea.
How do you prevent corneal ectasia?
Prevention of Corneal Ectasia in Refractive Surgery
- IDENTIFY AT-RISK CORNEAS. Additionally, proper patient selection may minimize the risk of corneal ectasia in patients undergoing refractive procedures.
- IDENTIFYING PATTERNS.
- IRREGULAR PACHYMETRY MAP.
Why do eyes regress after LASIK?
[13] found that refractive regression after LASIK is mainly caused by corneal protrusion rather than postoperative central corneal thickening or RBT. Our study indicated that myopic regression after LASIK was correlated with a low RBT preoperatively.