Clinical Features of Conjunctivitis The eye tends to water profusely and the white of the eye is bloodshot or pink. The eye is painful when moved and may be oversensitive to bright light. Sometimes, there is a discharge of pus from the eyelids.
Diagnosis of Conjunctivitis Doctors diagnose conjunctivitis based on the symptoms and by looking at the eye under a microscope. Depending on these findings, the cause can usually be determined. For instance, a colored discharge from the eye usually indicates a bacterial infection. But, when itching and tearing are the main symptoms, allergies are the most likely cause. With viral conjunctivitis there is usually no discharge, but there may be redness and tearing along with formation of follicles under the eyelids.