These surgical grafts are utilized across a variety of surgical applications: Fornix reconstruction, Symblepharon, Pterygium excision, Stevens-Johnson syndrome, Conjunctival chalasis, Chemical & thermal burns, Corneal ulcers, and Bullous keratopathy. Katena's Clearify™ process now retains the intermediate layer of amniotic membrane. Multi-layer Ambio grafts retain 80% more hyaluronic acid than previous generations.