“Pink eye” – Classic “pink eye” is caused by an infection of the eye by bacteria or viruses. It is sometimes difficult to differentiate between them, however, the typical bacterial infection produces a creamy eye discharge throughout the day, can be painful, and can be characterized by light sensitivity (photophobia). The condition is treated with antibiotic drops. A viral eye infection is more likely to be in one eye, is less generally less red, and the discharge is more clear than milky. Both conditions are treated with antibiotics, although the viral infection does not usually respond to antibiotics. Both are very contagious.
Allergic conjunctivitis is due to an allergies. The eye membranes swell, itch, and produce clear drainage in response to the same environmental substances that can cause hay fever (pollens, dust, molds, cat or dog hair). This condition is managed with allergy medications including drops and oral antihistamines. It is not contagious.
J S Robinson
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