| abstract |
The present invention provides a film having a flat or curved surface that protects tissues in the eye. The film can be used to cover the corneal endothelial cell layer of the eye, or to cover the front and rear surfaces of the iris, or in front of the posterior capsule of the crystalline lens, in order to protect the corneal endothelial cells or to isolate the tissues in the eye. The film is a layered structure composed of a collagen and a hydrophilic biopolymer or organic polymer material, and has the characteristics of high transparency and high water retention in a wet state of water absorption. |