Vision Problems

Two of the most common vision problems are Near-Sightedness (Myopia) and Far Sightedness (Hyperopia).

A person who is near-sighted is able to see near objects clearly but unable to see far objects clearly.

 Persons with near-sightedness have long eyeballs and hence when the the light rays come together at the focus it falls in front of the retina.  This problem may be corrected with a concave lens.

A person who is far-sighted is able to see distant objects clearly but not able to see close objects clearly.

 In persons with far-sightedness the eyeballs are short and when the light rays come together at the focus they fall behind the retina.

 This problem may be corrected with a convex lens.