Medical Eye Conditions

Ptosis

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Ptosis is a condition of the eye where the upper eyelid droops and covers part of the eye. It can have many causes including age, injury or nerve malfunction. It can also occur at birth.

Ptosis Diagram

Age is the most common cause of ptosis. The muscles that elevate the eyelid stretch and become thin, resulting in a loss of muscle tone and the inability to hold the upper lid in the proper position above the eye.

Injury is another common cause of ptosis. Trauma to the eye, such as during an automobile accident, can damage the delicate structures around and in the eye.

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Sometimes ptosis can be noticed at birth. In these cases, it is due to an abnormality in the development of the muscles that elevate the upper lid. Three-quarters of the time it affects only one eye.

The most common treatment for ptosis is eye surgery. The goal is to tighten the muscles so that the lid is elevated to match the lid on the other side. In the age-related ptosis, both eyelids may be drooping, but only one is low enough to require surgery. The second eye also may eventually require surgery.

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