keratoprostheses

A keratoprosthesis is an artificial cornea used to restore vision in patients with severe corneal blindness. When a patient's cornea is damaged beyond the ability to be replaced with a donor cornea, a keratoprosthesis may be considered. These devices are designed to replace the diseased or opaque cornea, allowing light to enter the eye and reach the retina. The procedure to implant a keratoprosthesis is complex and typically reserved for cases where traditional corneal transplantation has failed or is not a viable option.

There are various types of keratoprostheses, with the Boston keratoprosthesis (KPro) being the most commonly used in many parts of the world. These devices generally consist of a clear optical lens made of polymethyl methacrylate (PMMA) that is secured in place by a donor corneal rim or a synthetic skirt. The keratoprosthesis allows for immediate visual rehabilitation in many patients.

The implantation surgery involves removing the diseased cornea and replacing it with the artificial device. Post-operative care is crucial for the success of the procedure and includes regular monitoring for complications such as infection, glaucoma, or device extrusion. While keratoprostheses can offer significant visual improvement, they are not a permanent solution and may require replacement over time. Patients considering this procedure should discuss the risks, benefits, and long-term management with their ophthalmologist.