[Emergency corneal grafts].

Corneal ulceration leading to perforation can mainly occur after infection, trauma, corneal dryness and exposure keratitis. When corneal ulceration does not respond to medical treatment, a penetrating keratoplasty allows the elimination of infected tissue and antigenic material. It can restore the integrity of the anterior segment of the eye. The tissue taken could serve for bacteriologic research. In spite of the great number of complications the percentage of success is about 50%.