an abnormality of eyelid position by which the upper eyelid overrides the lower eyelid on closure, leading to chronic ocular irritation.
eye·lid im·bri·ca·tion
(ī'lid im'bri-kā'shŭn) An abnormality of eyelid position by which the upper eyelid overrides the lower eyelid on closure, leading to chronic ocular irritation.