We will measure postoperative differences in visual acuity, contrast sensitivity, corneal light scatter, density of keratocytes and subbasal nerves, corneal sensitivity, corneal topography and wavefront between PRK performed with epithelial removal by a laser or by a rotary brush and between LASIK performed by using a microkeratome or by using a femtosecond laser. Measurements will be made at baseline and at intervals over 5 postoperative years in 21 LASIK patients, 20 PRK patients, and 20 unoperated controls.
Myopia 1-10 diopters No other ocular abnormalities except presbyopia
If you are having PRK, you will have standard PRK in one eye and a modified technique (LASEK) in the other eye. Which eye receives which procedure will be determined by chance (as in the flip of a coin).
If you are having LASIK, you will have standard LASIK in one eye and a modified technique (bladeless LASIK) in the other eye. Which eye receives which procedure will be decided by chance (as in the flip of a coin).
Participants will be enrolled in this research study for up to five years.
Last updated: 01/27/2010