Conjunctivitis
Conjunctivitis is an inflammation of the conjunctiva, the clear membrane that covers the white part of the eye and lines the inner surface of the eyelids. ... Infectious conjunctivitis is usually caused by either bacteria or viruses. Many different bacteria can cause conjunctivitis but the most common are Streptococcus pneumoniae, Haemophilus influenzae, and Staphylococcus aureus. The organisms that cause the sexually transmitted diseases gonorrhea and chlamydia can also infect the eyes and cause conjunctivitis. ... Viral conjunctivitis is common with several viral infections - most often with infections caused by adenoviruses or enteroviruses - and can occur during a common cold or the flu. A less common but more serious viral conjunctivitis is herpes simplex infection. Parasites and fungal infections are rare causes of conjunctivitis. Conjunctivitis is an inflammation of the conjunctiva, the clear membrane that covers the white part of the eye and lines the inner surface of the eyelids.