Customized PRK corrected irregular astigmatism after previous penetrating keratoplasty, according to a study. Best corrected visual acuity improved in almost half of all eyes, Simon P. Holland, MD, ...

SAN FRANCISCO — Topographically guided PRK was effective in treating irregular astigmatism after penetrating keratoplasty, according to a study presented here. "Topographically guided PRK for ...

When you think of corrective vision surgery, LASIK may be the first procedure that comes to mind, but did you realize there are other options available that might be better for you? PRK is an older, ...

Astigmatism is when either the cornea or the crystalline lens in the eye does not curve in the usual way. A person may have blurred vision or find themselves squinting. Corrective lenses can often ...

PRK might be better if you have thin corneas or worry about dry eye. After LASIK, 90% of people have vision between 20/20 and 20/40 without glasses or contacts. Both LASIK and PRK are safe and ...

Laser vision correction (LASIK and PRK) is a relatively new procedure used to reduce or eliminate a person's dependence on glasses and contact lenses. The procedure is performed on an outpatient basis ...

Of all of the methods of astigmatism correction, laser vision correction is the most precise. FDA labeling specifies the degree of astigmatism that each laser may treat. For instance, the VISX Star S4 ...