Generally, visuals are focused on the retina at the back of the eye. With nearsightedness, farsightedness or astigmatism, photos are focused both in front of or at the rear of the retina. This leads to blurred vision. Corneal ectasia. Corneal ectasia, a issue wherein the cornea is too slender and https://arthurnhqbt.blogtov.com/8557873/detailed-notes-on-implantable-contact-lens