Wednesday, October 1, 2008


A sheep farmer in Australia presents with the eye shown above. The patient complains it is irritating, red, and disfiguring.

Challenge: What is it?

Image shown under fair use.


Craig Chen said...


This is a pterygium, a triangular wedge of conjunctival tissue that extends onto the corneal surface. They typically occur medially on the ocular surface, extending horizontally from the nasal conjunctiva onto the cornea. It is unlikely to be sight-threatening.

Sources: UpToDate;

Alex said...

good thing it's not loa loa