The corneal implant of the current invention takes the general form of a thin, transparent, flexible, porous, biocompatible film of suitable polymer material. The implant is sufficiently porous, the porosity being imparted by the film being irradiated to produce tracks and the material in those tracks...http://www.google.fr/patents/US7364674?utm_source=gb-gplus-shareBrevet US7364674 - Corneal implants produced by irradiation of polymer films
Corneal implants produced by irradiation of polymer films