Typically, photographs are focused on the retina in the back of the eye. With nearsightedness, farsightedness or astigmatism, photographs are focused either before or behind the retina. This leads to blurred vision. PRK, or photorefractive keratectomy, also reshapes the cornea but doesn't need a flap. The highest layer on the https://lasik77565.thelateblog.com/28590210/5-easy-facts-about-best-optometrist-near-me-described