A device which may be implanted in the cornea of the eye to replace both the cornea and the lens, and which is biocompatible with the tissue in the eye. A concave base plate with a support cylinder connected integrally through its center is used and implanted in the eye using a microkeratome technique....http://www.google.es/patents/US4586929?utm_source=gb-gplus-sharePatente US4586929 - Hydrogel keratoprosthesis
