How is conjunctivitis treated?

Depends on the cause. Conjunctivitis is an eye irritation that has many causes. Irritants (sand, etc): eyewash or removal allergens (pollens, etc): avoidance or moving away from the allergen viral infections (except the herpes virus): time, good hygiene bacterial infections (and herpes infections): antimicrobial eye drops very important to seek the help of you doctor as untreated herpes infection can lead to blindness!
Conjunctivitis. Conjunctivitis is infectious or non-infectious, and this can usually be determined by examination and the appropriate therapy used that is specific for each. Antibiotic drops are used for bacterial infections, antiviral drops for a viral etiology, and non-infectious causes require specific drop therapy.