Is a pterygium grows large enough to cause problems or affect vision we will probably recommend surgery to remove it. Once the pterygium is removed , a thin piece of normal tissue from under the eyelid is transplanted onto the affected area. This technique significantly reduces the chance that the pterygium will grow back.

The best way to keep pinguecula and pterygium from coming back is to block ultraviolet light, and avoid dryness and dust.
Pterygium Surgery image