is frequently associated with bilateral corneal arcus, with less common association in types III, IV and V. Diffuse bilateral opacification of the cornea with accentuation towards the limbus is a ...

The outer border of the cornea, the limbus, contains many healthy stem cells ... As a result, the surface of the eye develops permanent damage -- a condition called limbal stem cell deficiency.

Medical research has shown that tissue stem cells taken from a part of the eye called the limbus can be used to repair damage to the cornea, the transparent layer at the front of the eye.