Conjunctivitis (also known as pink eye) refers to the conjunctiva inflammation - conjunctiva is the eye's white part. Conjunctivitis normally has the following symptoms: eye dryness, itchiness, irritation, blurred vision and etc..
Conjunctivitis is often caused by viruses. Other factors may include: bacteria (like chlamydia or gonorrhea), irritants (such as shampoos, chlorine, dirt or polluted air), or allergies (dust or pollen).
Bacteria and viruses conjunctivitis can be very contagious, but if diagnosed and treated promptly, it will not pose serious risks. Antibiotics (eye drops, ointments, or pills) can be used to treat the infected eye.