Drooping of the upper eyelid due to paralysis.
Drooping of the upper eyelid tissue due to diseases that affect the muscles or nerves of the eye, such as myasthenia gravis or stroke.
Drooping of one or both upper eyelids; also called ptosis. The cause is usually weakness in the muscle that raises the lid. In mild cases, the upper range of vision is blocked; in severe cases, the person can see little or nothing out of the eye without raising the eyelid by hand or tilting the head back. In children who are born with blepharoptosis, usually only one eye is affected. The condition also appears as people age, usually as a result of overall loss in muscle tone. Less often, blepharoptosis is a result of injury or such diseases as diabetes mellitus, type 1 and type 2; myasthenia gravis; or cancer in locations that affects nerve and muscle responses (for example, the base of the neck).