Correcting Common Problems PRK can correct common vision problems, enabling most people to resume normal activities without glasses or contact lenses. In a normal eye, light rays flow through the cornea and lens and focus on the retina without blurring. A nearsighted, or myopic eye is longer than normal.
Light rays focus in the front of the retina.
Distant objects look blurry. A farsighted, or hyperopic, eye is shorter than normal. Caused by changes in the curve of the cornea itself, astigmatism distorts the dight rays entering the eye and prevents them from focussing clearly. The excimer laser Developed in the early 1980s, the excimer laser is a proven and predictable tool for treating eye problems. Using pulses of high energy ultraviolet light, this unique laser can remove tisue without heating or damaging surrounding areas.