Ordinarily, images are centered on the retina in the back of the attention. With nearsightedness, farsightedness or astigmatism, photographs are concentrated either in front of or behind the retina. This leads to blurred vision. Corneal ectasia. Corneal ectasia, a ailment where the cornea is just too slim and weak, has https://franciscotmcsc.blogproducer.com/34332628/fascination-about-eye-hardware