Pterygium

A pterygium is a non-cancerous growth that starts in the clear, thin tissue (conjunctiva) of the eye. This growth covers the white part of the eye (sclera) and extends onto the cornea. It is often slightly raised and contains visible blood vessels. The problem may occur on one or both eyes.

Eye anatomy

The cornea is the clear layer covering the front of the eye. The cornea works with the lens of the eye to focus images on the retina.

Causes

Symptoms

Exams and Tests

Treatment

Outlook (Prognosis)

Possible Complications

When to Contact a Medical Professional

Prevention