What Caused This Woman's Ocular Symptoms?

For several months, a 45-year-old woman has had ocular irritation, tearing, blurred vision, and swelling of the eyelids in both eyes. A close-up view of her eyelashes is shown here.

Why haven't her symptoms responded to standard treatments for allergic conjunctivitis and blepharitis?

Answer: Lice infestation of the eyelashes

For more information about this case, please click here.

(Case and photograph courtesy of Alex M. Gerber, DO and Richard Luck, DO.)