PHEMA as a keratoprosthesis material

摘要

An aim to provide an optimised keratoprosthesis, with excellent biointegration, and all other properties meeting ideal requirements, is one we share with Mehta et aV However, their paper includes some points that require clarification. PHEMA (poly(2-hydroxyethyl methacry-late) is a non-toxic polymer of the toxic monomer HEMA, though cytotoxicity is still possible if non-reacted monomer has not been fully removed. The "polyhydroxyethyl methacrylate" the authors obtained for their study was not fully described, and may have been contact lens blanks, unlikely to have been processed for "implantable quality." Whether the samples had been fully extracted was not stated, nor was the hydration of the samples when used for the study. Contact lens blanks are not designed for cell adhesion and the results of this study, with regard to PHEMA, are entirely predictable and have been previously reported.