Dua Layer

The Dua layer is a 15-micron (0.00059 inches) layer of collagen located at the back of the cornea. Despite its extreme thinness, it is very strong and impervious to air, as was discovered when the scientists who discovered it were injecting air into the cornea.

Knowledge of the location and characteristics of Dua's layer can help in corneal surgery, allowing doctors who are doing corneal transplants or grafts including a process of injecting air into the cornea -- to inject it under the Dua's layer and avoid the complication of tissue damage.

Related diseases: keratoconus.