How big is the corneal flap?
For more than 8 years now, I have performed topography-guided treatment in hyperopic eyes. In hyperopic cases, the flap diameter is 9.5 mm. The larger flap diameter means more cutting time is required; it takes approximately 12 seconds for the FS-200 to create a 9.5-mm flap.
What is a good corneal thickness for LASIK?
A good LASIK candidate will usually have a cornea that is 450-550 microns thick. This is only determined when you are at your LASIK consultation.
How easy is it to dislodge the flap after LASIK?
The dislodging of a flap after LASIK is very rare and occurs in less than 1% of cases. Given the precise nature of modern, bladeless LASIK, the flap is able to heal so seamlessly that it would be surprising to see an injury result in flap complications.
What happens to the flap after LASIK?
The corneal flap begins healing immediately after the LASIK procedure. In fact, with the use of a LASIK flap, the corneal tissue can be as much as 90% healed within 24 hours. During the first day or two after surgery, the outer surface of the cornea, known as the epithelium, seals the edges of the corneal flap.
Does LASIK have a flap?
During LASIK surgery, a small flap is created in the frontal, topmost layer of the cornea. This layer is called the epithelium. Using this epithelial flap, the cornea can be reshaped and recontoured as needed to address refractive errors (i.e., myopia/nearsightedness, hyperopia/farsightedness, and astigmatism).
How do you know if your cornea is thick?
A pachymetry test is a simple, quick, painless test to measure the thickness of your cornea. With this measurement, your doctor can better understand your IOP reading, and develop a treatment plan that is right for your condition. The procedure takes only about a minute to measure both eyes.
Can wearing contacts thin your cornea?
Conclusions: Soft contact lenses and rigid gas-permeable contact lenses cause corneal thickening and corneal flattening in the first months, but they cause corneal thinning and corneal steepening with time. These alterations can be evaluated as evidence that contact lenses negatively influence corneal physiology.
How strong is the LASIK flap?
Laboratory and animal studies have demonstrated that the tensile strength of the edge of the flap is approximately 28% of that of the normal corneal stroma while the flap interface is less than 5%.
Can you ever rub your eyes again after LASIK?
As a good rule of thumb, you should only put light pressure (with no rubbing) on the eyes for the first two weeks post-op. After this time, and for a couple of months, it is okay to gently rub your eyes.
How common is LASIK flap dislocation?
Postoperative laser-assisted laser in situ keratomileusis (LASIK) flap dislocation occurs in approximately 1%-2% of patients, and the greatest risk of non-traumatic flap shift occurs within the first post-operative day after the surgery, presumably as a result of a mechanical trauma–.