What characterizes a pterygium?

A pterygium is characterized by a growth of the conjunctiva, which is the clear membrane covering the white part of the eye, extending onto the cornea. This growth often appears as a fleshy, triangular tissue and can vary in size and severity. Pterygium is typically associated with prolonged exposure to UV light, dust, and environmental factors, leading to its common occurrence in people who spend significant amounts of time outdoors.

The presence of a pterygium can affect vision if it grows large enough to interfere with the visual axis, potentially leading to issues such as astigmatism. In some instances, it can be surgically removed if it poses a cosmetic concern or vision impairment. Understanding the nature of a pterygium is crucial for proper diagnosis and management in an optometric setting.