Pinguecula

Definition:

A common, nonmalignant growth of the mucous membrane that lines the eyelids (conjunctiva).

Causes, incidence, and risk factors:

A pinguecula is a small, yellowish lesion derived from the conjunctiva. It can appear on both sides of the cornea, but usually appears on the nasal side. It generally does not increase in size. It occurs commonly in adults. The cause is unknown, but chronic sunlight exposure and eye irritation may contribute to its development.