Conjunctivitis or pink eye
Inflammation - conjunctiva; Pink eye; Chemical conjunctivitis, Pinkeye; Pink-eye; Allergic conjunctivitisThe conjunctiva is a clear layer of tissue lining the eyelids and covering the white of the eye. Conjunctivitis occurs when the conjunctiva becomes swollen or inflamed.
Conjunctiva
The conjunctiva is a thin, clear membrane that covers the inner surface of the eyelid and the white part of the eyeball (the sclera). It contains ma...
Read Article Now Book Mark ArticleThis swelling can be due to an infection, an irritant, dry eyes, or an allergy.
Causes
Tears most often protect the eyes by washing away germs and irritants. Tears contain proteins and antibodies that kill germs. If your eyes are dry, germs and irritants are more likely to cause problems.
Antibodies
An antibody is a protein produced by the body's immune system when it detects harmful substances, called antigens. Examples of antigens include micr...
Read Article Now Book Mark ArticleConjunctivitis is most often caused by germs such as viruses and bacteria.
- "Pink eye" most often refers to a highly contagious viral infection that spreads easily among children.
- Conjunctivitis can be found in people with COVID-19 before they have other typical symptoms.
- In newborns, an eye infection may be caused by bacteria in the birth canal. This must be treated at once to preserve eyesight.
- Allergic conjunctivitis occurs when the conjunctiva becomes inflamed due to a reaction to pollen, dander, mold, or other allergy-causing substances.
A type of long-term allergic conjunctivitis may occur in people who have chronic allergies or asthma. This condition is called vernal conjunctivitis. It most commonly occurs in young men and boys in the spring and summer months. A similar condition can occur in long-time contact lens wearers. It may make it difficult to continue to wear contact lenses.
Anything which irritates the eye may also cause conjunctivitis. These include:
- Chemicals.
- Smoke.
- Dust.
- Over-use of contact lenses (often extended-wear lenses) can lead to conjunctivitis.
Symptoms
Symptoms include:
- Blurred vision
Blurred vision
There are many types of eye problems and vision disturbances, such as: Halos Blurred vision (the loss of sharpness of vision and the inability to see...
Read Article Now Book Mark Article - Crusts that form on the eyelid overnight (most often caused by bacteria)
- Eye pain
Eye pain
Pain in the eye may be described as a burning, throbbing, aching, or stabbing sensation in or around the eye. It may also feel like you have a forei...
Read Article Now Book Mark Article - Gritty feeling in the eyes
Gritty feeling in the eyes
Eye burning with discharge is burning, itching, or drainage from the eye of any substance other than tears.
Read Article Now Book Mark Article - Increased tearing
- Itching of the eye
Itching of the eye
Eye burning with discharge is burning, itching, or drainage from the eye of any substance other than tears.
Read Article Now Book Mark Article - Redness in the eyes
Redness in the eyes
Eye redness is most often due to swollen or dilated blood vessels. This makes the surface of the eye look red or bloodshot.
Read Article Now Book Mark Article - Sensitivity to light
Sensitivity to light
Photophobia is eye discomfort in bright light.
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Exams and Tests
Your health care provider will:
- Examine your eyes
- Swab the conjunctiva to get a sample for analysis
There are tests that can sometimes be done in the office to look for a specific type of virus as the cause.
Treatment
Treatment of conjunctivitis depends on the cause.
Allergic conjunctivitis may improve when allergies are treated. It may go away on its own when you avoid your allergy triggers. Cool compresses may help soothe allergic conjunctivitis. Eye drops that contain antihistamines for the eye or drops containing steroids, may be necessary in more severe cases.
Allergic conjunctivitis
The conjunctiva is a clear layer of tissue lining the eyelids and covering the white of the eye. Allergic conjunctivitis occurs when the conjunctiva...
Read Article Now Book Mark ArticleAntibiotic medicines work well to treat conjunctivitis caused by bacteria. These are most often given in the form of eye drops. Viral conjunctivitis will go away on its own without antibiotics. Mild steroid eye drops may help ease discomfort.
If your eyes are dry, if may help to use artificial tears in conjunction with any other drops you may be using. Be sure to allow about 10 minutes in between using different types of eye drops. Crustiness of the eyelids can be helped by applying warm compresses. Gently press clean cloth soaked in warm water to your closed eyes.
Other helpful steps include:
- Do not smoke and avoid secondhand smoke, direct wind, and air conditioning.
- Use a humidifier, especially in the winter.
- Limit medicines that may dry you out and worsen your symptoms.
- Clean eyelashes regularly and apply warm compresses.
Outlook (Prognosis)
The outcome for bacterial infections is most often good with early antibiotic treatment. Pinkeye (viral conjunctivitis) can easily spread through entire households or classrooms, but a full recovery is expected.
When to Contact a Medical Professional
Contact your provider if:
- Your symptoms last longer than 3 or 4 days.
- Your vision is affected.
- You have light sensitivity.
- You develop eye pain that is severe or becoming worse.
- Your eyelids or the skin around your eyes becomes swollen or red.
- You have a headache in addition to your other symptom.
Prevention
Good hygiene can help prevent the spread of conjunctivitis. Things you can do include:
- Change pillowcases often.
- Do not share eye makeup and replace it regularly.
- Do not share towels or handkerchiefs.
- Handle and clean contact lenses properly.
- Keep hands away from the eye.
- Wash your hands often.
References
Centers for Disease Control and Prevention website. Conjunctivitis (pink eye). How to prevent pink eye. www.cdc.gov/conjunctivitis/prevention/. Updated April 15, 2024. Accessed June 18, 2024.
Dupre AA, Vojta LR. Red and painful eye. In: Walls RM, ed. Rosen's Emergency Medicine: Concepts and Clinical Practice. 10th ed. Philadelphia, PA: Elsevier; 2023:chap 18.
Holtz KK, Townsend KR, Furst JW, et al. An assessment of the adenoplus point-of-care test for diagnosing adenoviral conjunctivitis and its effect on antibiotic stewardship. Mayo Clin Proc Innov Qual Outcomes. 2017;1(2):170-175. PMID: 30225413 pubmed.ncbi.nlm.nih.gov/30225413/.
Khavandi S, Tabibzadeh E, Naderan M, Shoar S. Corona virus disease-19 (COVID-19) presenting as conjunctivitis: atypically high-risk during a pandemic. Cont Lens Anterior Eye. 2020;43(3):211-212. PMID: 32354654 pubmed.ncbi.nlm.nih.gov/32354654/.
Kumar NM, Barnes SD, Pavan-Langston D. Azar DT. Microbial conjunctivitis. In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 112.
Rubenstein JB, Spektor T. Conjunctivitis: infectious and noninfectious. In: Yanoff M, Duker JS, eds. Ophthalmology. 5th ed. Philadelphia, PA: Elsevier; 2019:chap 4.6.
Eye - illustration
The eye is the organ of sight, a nearly spherical hollow globe filled with fluids (humors). The outer layer (sclera, or white of the eye, and cornea) is fibrous and protective. The middle layer (choroid, ciliary body and the iris) is vascular. The innermost layer (retina) is sensory nerve tissue that is light sensitive. The fluids in the eye are divided by the lens into the vitreous humor (behind the lens) and the aqueous humor (in front of the lens). The lens itself is flexible and suspended by ligaments which allow it to change shape to focus light on the retina, which is composed of sensory neurons.
Eye
illustration
Eye - illustration
The eye is the organ of sight, a nearly spherical hollow globe filled with fluids (humors). The outer layer (sclera, or white of the eye, and cornea) is fibrous and protective. The middle layer (choroid, ciliary body and the iris) is vascular. The innermost layer (retina) is sensory nerve tissue that is light sensitive. The fluids in the eye are divided by the lens into the vitreous humor (behind the lens) and the aqueous humor (in front of the lens). The lens itself is flexible and suspended by ligaments which allow it to change shape to focus light on the retina, which is composed of sensory neurons.
Eye
illustration
Review Date: 8/22/2022
Reviewed By: Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.