PTK gets rid of superficial irregular tissue in the cornea using an excimer laser. It is often used for corneal scars, surface area irregularities or recurrent erosions. The whole LASIK approach usually will take about quarter-hour for every eye. Most of the time will involve preparing and positioning as opposed https://iseodirectory.com/listings13426680/new-step-by-step-map-for-lasik-eye-surgery