Myopia (or nearsightedness) is a condition in which the cye can see nearby object clearly but distant ones appear blurred. It is usually due to the eyeball being longer than normal (elongated) from front to back. The light rays converge at a point in front of the retina and are diverging again when they reach it. This results in a blurred image. Near - sightedness is corrected by placing a concave lens in front of the eye. This lens causes the light rays to converge farther back so that they are focused on the retina.