A cat eye is a type of coloboma. Any defect in the iris that allows light to enter the eye, other than through the pupil, is called a coloboma. An extra hole or slit may be present from birth, or may result from trauma. Colobomas may also exist in the eyelid, a defect which interrupts the border of the eyelid.

Review Date: 3/15/2001 12:00:00 AM Reviewed By:A.D.A.M. Medical Illustration Team

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