1. Conjunctivitis : Causes, incidence, and risk factors  (Trust Mark: Doctor-Reviewed)
The conjunctiva is exposed to bacteria and other irritants. Tears help protect the conjunctiva by washing away bacteria. Tears also contain enzymes and antibodies that kill bacteria. There are many causes of conjunctivitis. Viruses are the most co...• Reviewer: Linda Vorvick, MD, Family Physician, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

2. Conjunctivitis  (Trust Mark: Doctor-Reviewed)
Conjuctivitis is an inflammation resulting in redness of the lining of the white part of the eye and the underside of the eyelid (conjunctiva) that can be caused by infection, allergic reaction, or physical agents like infrared or ultraviolet light.• Author: Lisa Papp RN, Rosalyn Carson-DeWitt MD