an eye with a grey area covering one corner

What is a pterygium?

A pterygium (pronounced tur-IJ-ee-um) is a wing-shaped fleshy overgrowth on the surface of your eye. This can eventually extend onto the surface of your cornea, which is the clear front window of your eye. Pterygia are believed to be caused by dry eye and environmental elements such as wind, dust and ultraviolet light. In most cases, a pterygium grows from the inner corner of the eye closest to your nose, although it can also grow from the outer corner as well. It can affect one or both eyes.

Further reading

Download the info sheet: Pterygium, pinguecula and conjunctival lesions (PDF 70kb)
Download the info sheet: Following pterygium and conjunctival lesion surgery (PDF 97kb)

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