A pingueculum is a yellowish patch or bump on the white of the eye, most often on the side closest to the nose. It is not a tumor, but an alteration of normal tissue resulting in a deposit of protein and fat. Unlike a pterygium, a pingueculum does not actually grow onto the cornea. A pingueculum may also be a response to chronic eye irritation or sunlight.

No treatment is necessary unless it becomes inflamed. A pingueculum does not grow onto the cornea or threaten sight. If particularly annoying, it may on rare occasions be surgically removed, but the postoperative scar may be as cosmetically objectionable as the pingueculum.