Scleral lenses are a special type of contact lens designed for people who have complications with corneal problems. The lenses are made to fit over the cornea, resting on the eye to correct the vision ...

[22] The use of allograft materials, among which the most common are sclera, pericardium, dura mater and cornea, has some disadvantages. Insofar as they are foreign bodies, they have a prima facie ...