Dry Eye vs Allergic Conjunctivitis: How to Tell Them Apart | Optometry
"Doctor, my eyes are red and uncomfortable." It may be the most common sentence heard in an eye clinic. Behind it, there are dozens of possible diagnoses, but two of the most frequent are dry eye disease and allergic conjunctivitis . The two conditions look alike at first glance. Both cause red, irritated, watery eyes, and both are often made worse by dust, wind, and screen use. They can even happen together. But they have different causes and need different treatment, and using the wrong drops can make either one worse. This guide explains how to tell dry eye from allergic conjunctivitis using symptoms, timing, signs, and simple clinical tests. It is written for optometry students and clinicians, and it is also helpful for patients who want to understand their own eye symptoms. Important: This article is for education only and does not replace a professional eye examination. Do not start medicated eye drops, especially steroid drops, without advice from an eye care p...