Diseases Treatment

The way that light from objects is focused through the eye into an image on the retina is called refraction. In a normal eye, the point where the light focuses is exactly at the retina, and it is this precise focusing that assures that a clear image is seen. In some eyes, however, the eye focuses the light either behind or in front of the retina, so that the image is blurred.The four most common disorders of refraction are nearsightedness (myopia), farsightedness (hypermetropia), astigmatism and presbyopia. Any of these disorders can be present in one or both eyes.