Corneal Transplants, Penetrating Keratoplasty
Due to the cornea being avascular (meaning it has no blood flowing through it) cornea transplants are quite successful. Cornea transplants can result with eyeglasses working for vision correction, but many times contact lenses are required. Following cornea transplant, the eye normally requires one year to heal fully. At this time, the transplant surgeon may deem the contact lens fitting procedure to begin.
Cornea transplants can result in a cornea with an irregular astigmatism and sometimes raised graft. The raised graft is the new cornea graft sitting higher than the patients own cornea forming a plateau. Lens Design has engineered a special Graft Contact Lens to correct this condition. The lens comes with a back surface lens fitting that attenuates for both the raised graft and the irregular or regular astigmatism. The front of the lens incorporates any additional prescription requirements.
Light Filter Over Scarred Area
A new advancement in corneal transplant contact lenses is the addition of a light filter in the shape of a donut printed onto the contact lens to block the light from passing through the scarred area of the cornea to reduce the unfocused light from entering the eye. The filter increases resolution of the eye to enhance the visual acuity. An added bonus is reduced photophobia, the eye is much more comfortable in bright sunlight.
The new technology contact lenses make corneal transplants see much better, often 20/20 with unsurpassed comfort compared to previous gas permeable lens fitting.