University of Iowa Health Care

Ophthalmology and Visual Sciences


Contributor: Jesse Vislisel, MD

Photographer: Randy Verdick, FOPS and Carol Chan, CRA

Pterygia are wing-shaped folds of conjunctiva and fibrovascular tissue that invade the superficial corneal layers. When extensive, they can result in corneal astigmatism or occlusion of the visual axis. They are almost always preceded by pingueculae and are often associated with ultraviolet light exposure.



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last updated: 02/23/2015
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