Introduction An acute conjunctival inflammation caused by bacteria, viruses, or allergy Often accompanies the common cold exanthems measles Extremely contagious Does not cause vision or pupil changes Bacterial Conjunctivitis Introduction caused by S. pneumoniae Staph N. gonorrhoaeae Chlamydia trachomatis Presentation symptoms minimal pain purulent discharge physical exam normal pupillary light response normal IOP Evaluation discharge culture and gram stain Treatment medical topical erythromycin Viral Introduction caused by adenovirus HSV Varicella Presentation symptoms similar bacterial conjuctival except watery discharge instead of purulent Treatment self limited warm compresses for symptomatic relief no medical treatment Allergic conjunctivitis Introduction caused by allergen Presentation symptoms painless marked puritis bilateral watery eyes Treatment medical antihistamines steroid drops