SUE FORD / SCIENCE PHOTO LIBRARY SUE FORD / SCIENCE PHOTO LIBRARY
Squint. Close-up of a woman's face showing a con- vergent squint (strabismus). Her eye (at left) has rolled so far in that the iris has nearly disapp- eared. In adults, squints are caused by disorders of the brain, disorders of the nerves controlling the eye muscles, or by disorders of the eye musc- les themselves. They are often symptomatic of more serious conditions, such as multiple sclerosis or stroke, and therefore demand medical investigation of the underlying cause. Squints cause persistent double vision, and can be corrected by special prismatic glasses or surgery. M155/286 for same patient after surgery.).
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