Clinical Research Directory

Inclusion Criteria: * 21 years of age, or older * have experienced a progressive deterioration in their vision, such that they can no longer achieve adequate functional vision on a daily basis with contact lenses, or spectacles. * have clear central corneas * have a corneal thickness of 450 microns or greater at the proposed incision site * have corneal transplantation as the only remaining option to improve their visual function Exclusion Criteria: * under 21 years of age * have not experienced a progressive deterioration in their vision, such that they can no longer achieve adequate functional vision on a daily basis with contact lenses, or spectacles. * do not have clear central corneas * do not have a corneal thickness of 450 microns or greater at the proposed incision site * do not have corneal transplantation as the only remaining option to improve their visual function