Pink eye (conjunctivitis) is caused by a viral infection. It is not dangerous. However, if it is not promptly treated, bacterial infection can lead to vision damage.
The risk of contracting pink eye is highest in people who spend a lot of time in crowded environments. It is spread through direct contact with the eye secretions of infected people, such as tears and eye discharges. The most common way to contract the contagious form of pink eye is through hand-to-eye contact or direct contact with contaminated objects, such as handkerchiefs, towels, glasses and even flies.
Within 24-48 hours after contagion, the symptoms include irritation, pain, tearing, sensitivity to light, thick eye discharge, swollen eyelids, redness in the white of the eye (which may begin in one eye or both eyes at the same time), low grade fever, body aches, and pains in the arms and legs. Patients usually recover within 1-2 weeks if there are no complication from bacterial infections.