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Common causes of eye redness
Beyond antibiotic eyedrops
You noticed that you had another case of pink eye when your eye felt slightly crusty in the morning, and when you looked in the mirror, you noticed that the same eye was bloodshot. It’s annoying, but at least antibiotic eyedrops will clear it up, right?
You might want to rethink that plan. For starters, pink eye (conjunctivitis) usually isn’t caused by a bacterial infection. In older adults, the most common cause is a viral infection. In fact, viruses cause up to 80 percent of conjunctivitis cases. Using antibiotic eyedrops does nothing to treat viral conjunctivitis, and side effects from the eyedrops may occur. In addition, eye redness can occur for numerous reasons that don’t involve infection.