As an eye doctor, diagnosing a red eye can be challenging. Are we dealing with an infection, allergy, inflammation or dryness?

One of the most common questions I get is, “Doc, my eyes are red, burning, itchy, and tearing. Is this dry eye or from allergies?” The short answer is it could be one, both, or neither....

Demodex  folliculorum -- often just called demodex -- is a mite that occurs naturally on many people's faces and resides in hair follicles, particularly the follicles of eyelashes. Most of the time, these mites cause no problems whatsoever. However, sometimes an infestation can become particularly parasitic,...