Pinguecula and pterygium are benign growths of the conjunctiva that can result from chronic actinic irritation. Both typically appear adjacent to the cornea at the 3-o’clock position, the 9-o’clock position, or both.
(See also Overview of Conjunctival and Scleral Disorders.)
DR P. MARAZZI/SCIENCE PHOTO LIBRARY
A pinguecula is a raised yellowish white mass within the bulbar conjunctiva, adjacent to the cornea. It does not tend to grow onto the cornea. However, it may cause cosmetic blemish or irritation if elevated due to inflammation and, although rarely necessary, can easily be removed and will typically not recur.
Paul Whitten/SCIENCE PHOTO LIBRARY
A pterygium is a fleshy triangular growth of bulbar conjunctiva, occurring only at the 3 and 9 o'clock meridians of either eye, usually not simultaneously. The pterygium may spread across and distort the cornea, induce astigmatism, and change the refractive power of the eye. Symptoms may include decreased vision and foreign body sensation. It is more common in sunny, hot, dry climates.
Pinguecula and pterygium
Pinguecula and pterygium are conjunctival growths that may result from chronic actinic irritation. Pinguecula (left) is accumulation of conjunctival tissue at the nasal or temporal junction of the sclera and cornea. Pterygium (right) is conjunctival tissue that becomes vascularized, invades the cornea, and may decrease vision due to obstruction or induced astigmatism. |
