10 Pink Eye Symptoms
8. One or Both Eyes
When caused by allergies, viruses, or bacteria, pink eye usually presents itself in both eyes simultaneously. Sometimes the infection begins in one eye but quickly spreads to the other. Physical damage to the eye, chemicals, and disease of the tear ducts often result in unilateral infections.
It is theoretically possible for conjunctivitis to remain localized in one eye for the duration of the illness, even when caused by a virus or bacterium. However, it usually spreads to both eyes as the pathogens make their way across the nose from one eye to the other. It spreads easily in the same way from person to person, especially among children.
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