Conjunctivitis
Conjunctivitis, commonly referred to as pinkeye, is an acute inflammatory condition of the eye affecting the conjunctiva, a thin layer that protects the eye's surface and inner eyelids. This condition can arise from various causes, including viral or bacterial infections, allergic reactions, and exposure to irritants. Symptoms typically include redness, burning sensations, mild pain, and discharge that may crust on the eyelids. The duration of conjunctivitis can range from a few days to a few weeks, and while it is often mild, it is highly contagious, particularly in its viral and bacterial forms.
Treatment varies based on the cause; viral conjunctivitis typically resolves on its own, while bacterial conjunctivitis often responds well to topical antibiotics. Allergic conjunctivitis, triggered by allergens like pollen or dust, can be managed with avoidance strategies and artificial tears. While conjunctivitis is generally not a cause for serious concern, it can lead to complications in developing regions, where repeated infections may result in blindness. Preventative measures, such as good hygiene practices and isolating affected individuals, are crucial in controlling its spread. Overall, conjunctivitis is a common eye condition that, while usually benign, can have significant implications in certain contexts.
Conjunctivitis
ALSO KNOWN AS: Pinkeye
ANATOMY OR SYSTEM AFFECTED: Eyes, immune system
DEFINITION: An acute inflammatory disease of the eye caused by infection or irritation.
CAUSES: Viral or bacterial infection, allergic reactions, exposure to chemicals or irritants
SYMPTOMS: Red or bloodshot eye, burning sensation, mild pain, discharge forming crust on eyelids
DURATION: Ranges from a few days to a few weeks
TREATMENTS: None or topical antibiotics
Causes and Symptoms
Conjunctivitis, or pinkeye, is one of the most common eye disorders. The conjunctiva is a thin translucent that overlies the white part of the eye and the inner surface of the eyelids. It protects the eye from foreign objects and infection.
![01-09-11 0222. Picture of myself with Conjunctivitis (or Pink Eye). By EvilQueenAcidBurn (XenaDance on Flickr) [Public domain or CC-BY-SA-2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons 86194016-28681.jpg](https://imageserver.ebscohost.com/img/embimages/ers/sp/embedded/86194016-28681.jpg?ephost1=dGJyMNHX8kSepq84xNvgOLCmsE2epq5Srqa4SK6WxWXS)
The conjunctiva may become inflamed through infection with a virus or bacterium, allergic reactions, and exposure to certain chemicals. Inflammation of the conjunctiva brings increased blood flow to the eye, producing a red or bloodshot appearance. Conjunctivitis causes a feeling of irritation, burning, or mild pain. A discharge often occurs, which may form a crust on the eyelids when it dries. Conjunctivitis does not cause visual loss, fever, or severe pain. It is typically mild and short-lived, lasting from a few days to a few weeks.
Most conjunctivitis is caused by infection and is highly contagious, spreading quickly from one eye to the other and from person to person by touch. Viral conjunctivitis will resolve without treatment, although symptoms may persist as long as a few weeks. Upper-respiratory symptoms may occur simultaneously because similar viruses cause the common cold. These viruses may live on surfaces for several hours and can be transmitted in poorly chlorinated swimming pools. Bacterial conjunctivitis causes a thicker discharge and more severe crusting. It is caused by various bacteria, and all respond well to topical antibiotics.
Allergic conjunctivitis may be stimulated by a reaction to dust, mold, animal dander, or pollen. It causes burning or in both eyes and occurs in a seasonal pattern. Chemicals, wind, dust, smoke, and chronic dry eyes can also cause direct irritation of the conjunctiva.
Treatment and Therapy
For viral conjunctivitis, no therapy is required, but the patient may be contagious for as long as two weeks. Common bacterial conjunctivitis resolves quickly with eyedrops or ointment. A person remains contagious with bacterial conjunctivitis until after twenty-four hours of antibiotic treatment. The spread of infection can be prevented by washing one’s hands frequently, using separate towels, and isolating an infected child from interaction with other children for the first twenty-four hours of treatment. For allergic conjunctivitis, avoiding the offending and using topical or artificial tears are effective treatments.
Perspective and Prospects
Conjunctivitis is generally benign and rarely causes permanent injury. However, in many developing countries, conjunctivitis is a leading cause of blindness. In areas of extreme poverty, repeated infections with trachoma, a bacterial infection spread by flies, can lead to permanent scarring of the eyes. Newborns may also contract severe bacterial conjunctivitis from the mother’s during birth. For this reason, most developed nations require that all newborns receive antibiotic eyedrops at birth.
Bibliography:
“Conjunctivitis or Pink Eye.” Medline Plus, 8 Aug. 2022, medlineplus.gov/ency/article/001010.htm. Accessed 1 Apr. 2024.
"Conjunctivitis (Pink Eye). Centers for Disease Control and Prevention, 12 Nov. 2021, www.cdc.gov/conjunctivitis/index.html. Web. Accessed 1 Apr. 2024.
Johnson, Gordon J., et al., eds. The Epidemiology of Eye Disease. 3rd ed. London: World Scientific, 2012. Print.
Longo, Dan, et al., eds. Harrison’s Principles of Internal Medicine. 21st ed. New York: McGraw-Hill, 2022. Print.
Parker, James N., and Philip M. Parker, eds. The Official Patient’s Sourcebook on Conjunctivitis. San Diego: Icon Health, 2002. Print.
Stoffman, Phyllis. The Family Guide to Preventing and Treating One Hundred Infectious Illnesses. New York: John Wiley & Sons, 1995. Print.