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, ...

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 ...

Using measurements obtained by corneal topography, patients with symmetric bow tie corneal astigmatism can be placed into one of four categories for planning purposes. These categories are shown in ...

To compare 3-year results of PRK–MMC and phakic intraocular lens (PIOL) implantation in patients with >8.0 diopters (D) of myopia. This study was conducted as a non-randomized clinical trial on 23 ...

The eye acts like a camera, capturing light through the front surface (the cornea) and focusing it onto the "film" at the back of the eye (retina). To get a clear picture, the eyeball and all of its ...