Conjunctivitis, also called pinkeye, is the inflammation of the surface of the eye. The outer layer of the eye, the conjunctiva, becomes irritated and red.
Allergies can cause conjunctivitis. Conjunctivitis from allergies occurs when an allergen, something that triggers an allergy, irritates the surface of the eye.
Other causes of conjunctivitis are bacterial and viral infections. If a virus or bacteria causes the pink eye, there is a conjunctivitis incubation period of approximately five to twelve days before the symptoms begin.
There is no conjunctivitis incubation period for allergic conjunctivitis. The symptoms begin when the eye comes in contact with the triggering allergen.
Some forms of pinkeye have much shorter incubation periods. Gonococcal conjunctivitis in adults causes symptoms after only twelve to forty-eight hours after exposure, while the gonococcal conjunctivitis incubation period in newborns is two to five days.
The newborn can develop pinkeye from exposure to Chlamydia during birth. The conjunctivitis incubation period for pinkeye from Chlamydia exposure is five to fourteen days.
Adult inclusion pink eye from Chlamydia can have a long incubation period. The conjunctivitis incubation period for adult inclusion pink eye is two to nineteen days.
Viral and bacterial conjunctivitis can cause redness, eyelid swelling, tearing, and itchiness. People with pinkeye may awaken with a sticky discharge on their eyelashes. Pinkeye can also cause sensitivity to light.
Tearing, itchiness, and redness are symptoms of allergic conjunctivitis. Conjunctivitis from allergies does not usually cause discharge from the eyes like conjunctivitis from other causes. Symptoms from allergic conjunctivitis resolve on their own after the exposure to the allergen is stopped.
Conjunctivitis from allergies is not contagious. Viral and bacterial conjunctivitis are very contagious.
Antibiotics are used to treat bacterial pink eye. Antibiotics are often prescribed for people with pinkeye from viral infections even though antibiotics do not cure viral pinkeye. This is because many people need to be on antibiotics in order to return to school or work.
The symptoms from viral conjunctivitis are typically gone in about a week. Severe cases of viral pink eye can last up to three weeks.
Posted under Allergies
This post was written by Moses Wright on July 18, 2009
