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.
Ophthalmic Atlas Images by EyeRounds.org, The University of Iowa are licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.