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 ...

Medically reviewed by Andrew Greenberg, MD Key Takeaways PRK might be better if you have thin corneas or worry about dry ...

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, ...

Vision correction surgery, also called refractive and laser eye surgery, refers to any surgical procedure used to fix vision problems. Recent years have seen huge advances in this field. Refractive ...

What Is Photorefractive Keratectomy Surgery? Also known as PRK, this type of laser eye surgery can help if you are nearsighted, farsighted, or have astigmatism. It works best if your eye problem is ...

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 ...