Epikeratophakie

Compare the inner layers of the cornea with armed concrete. 
A contact lens is created using a donor cornea and attached to the eye. The edges of this section are stitched in a little wound that has been created around the eye's own cornea. After some time the new cornea is fully accepted and dissolved into the own cornea.

Advantages:

• No tissue is removed … it is actually added on
• The chance of rejection is small because of the special methods used
• If necessary, the extra bit of cornea is easily removed
• Curvature correction occurs in the attached new cornea

• It can take days to weeks before vision becomes clear again
• Rejection (although unlikely) can occur which will result in reversing the procedure
• There is an ethical debate to consider for the use of donor tissue for cosmetic reasons.