It is the growth of the conjunctiva, the thin tissue above the eye, extending onto the corneal surface. The condition appears as a wing like triangular membrane; and can be seen on neck, elbows and ankles also. In some cases it is responsible for the distortion of the corneal topography, but most off the time it is small, atrophic quiescent lesion. The main symptom of a pterygium is a raised white tissue, with blood vessels on the inner or outer edge of the cornea. It is generally painless, but it may become inflamed causing burning. If the condition is causing discomfort to the patient, surgical removal is prescribed.