Pterygium, also known as surfer's eye, most often refers to a benign growth of the conjunctiva. A pterygium commonly grows from the nasal side of the conjunctiva. It is usually present in the palpebral fissure. It is associated with and thought to be caused by ultraviolet-light exposure (e.g., sunlight), low humidity, and dust. The predominance of pterygis on the nasal side is possibly a result of the sun's rays passing laterally through the cornea, where it undergoes refraction and becomes focused on the limbic area.
Conjunctival auto-grafting is a surgical technique that is an effective and safe procedure for pterygium removal. When the Pterygium is removed the bare sclera is covered with conjunctival tissue that is surgically removed from an area of healthy conjunctiva. The "self-tissue" is fixated using tissue adhesive and therefore no sutures are needed.