Pterygium (conjunctiva)

Pterygium (conjunctiva)

A pterygium as seen on the human eye

A pterygium is a benign growth of the conjunctiva that extends onto the cornea of the eye. It is often associated with prolonged exposure to ultraviolet light and dry, dusty conditions.

Symptoms and signs

Pterygium (conjunctiva)

The primary symptom of a pterygium is a painless area of raised white tissue, with blood vessels on the inner or outer edge of the cornea. Some pterygia may become red and swollen, while others may become large and thick, causing discomfort or distorting the shape of the eye.

Causes

While the exact cause of pterygia is not known, they are believed to be caused by a combination of genetic predisposition and environmental factors. Prolonged exposure to ultraviolet light, dry eye, and exposure to dust and wind are all thought to contribute to the development of pterygia.

Diagnosis

Diagnosis of a pterygium typically involves a thorough examination of the eye by an ophthalmologist. This may include a slit lamp examination, which allows the doctor to examine the front of the eye under high magnification.

Treatment

Treatment for pterygia depends on the severity of the symptoms. In mild cases, lubricating eye drops or ointments may be used to help reduce redness and irritation. In more severe cases, surgical removal of the pterygium may be necessary.

See also

• Pinguecula
• Surfer's eye