AlphaCor - Addition Technology Inc.

AlphaCor is a one piece convex disc consisting of a central transparent optic and an outer skirt that is entirely manufactured from poly (2 � hydroxyethyl methacrylate) or PHEMA. AlphaCor�s material and patented features are designed to promote retention and optimize patient outcomes.

Outer Skirt:
The outer skirt is an opaque, high water content, PHEMA sponge. The porosity of the sponge encourages biointegration with host tissue and thus promotes retention of the implanted device.

Central Optic:
The central optic core is a transparent PHEMA gel providing a refractive power similar to that of the human cornea. The optic core is designed to allow the patients� visual potential to be achieved.

The Interpenetrating Polymer Network (IPN):
The junctional zone between the skirt and central optic is the Interpenetrating Polymer Network or IPN. This is a permanent bond formed at the molecular level and is designed to prevent the down-growth of cells around the optic, which can lead to the formation of retroprosthetic membranes, one of the major complications historically associated with artificial corneas.

AlphaCor