Pterygium
A pterygium is a benign conjunctival lesion (here a triangular whitish/vascular growth) on the sclera that extends onto the cornea and can affect vision.
Paul Whitten/SCIENCE PHOTO LIBRARY
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A pterygium is a benign conjunctival lesion (here a triangular whitish/vascular growth) on the sclera that extends onto the cornea and can affect vision.
Paul Whitten/SCIENCE PHOTO LIBRARY