Commonly, visuals are centered on the retina at the back of the eye. With nearsightedness, farsightedness or astigmatism, pictures are centered possibly in front of or driving the retina. This results in blurred vision. Corneal ectasia. Corneal ectasia, a affliction wherein the cornea is too skinny and weak, is among https://rivertongc.idblogmaker.com/27717169/how-prk-can-save-you-time-stress-and-money