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What Is Eye Flu (Viral Conjunctivitis)?

Eye flu, or viral conjunctivitis, is an eye infection caused by a virus that inflames the conjunctiva, the thin membrane covering the white of the eye and inner eyelids. It often spreads through contact with contaminated hands, tears, or respiratory droplets. Symptoms include redness, tearing, burning, and sensitivity to light. One or both eyes may be affected. Although uncomfortable, most cases clear on their own within one to two weeks.

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What Is Eye Flu (Viral Conjunctivitis)?

Eye flu, or viral conjunctivitis, is an eye infection caused by a virus that inflames the conjunctiva, the thin membrane covering the white of the eye and inner eyelids. It often spreads through contact with contaminated hands, tears, or respiratory droplets. Symptoms include redness, tearing, burning, and sensitivity to light. One or both eyes may be affected. Although uncomfortable, most cases clear on their own within one to two weeks.

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What Causes Eye Flu?

Eye flu is usually caused by adenoviruses, the same group that leads to colds and sore throats. These viruses spread easily through direct contact, shared towels, or touching the eyes after touching contaminated surfaces. Outbreaks can occur in schools, offices, and households. Sometimes viral conjunctivitis follows an upper respiratory infection. Because the infection is highly contagious, proper hygiene helps prevent spread.

Common Symptoms of Eye Flu

Eye flu produces several clear symptoms.

  • Redness of the white part of the eye.
  • Watery discharge that may crust the lashes after sleep.
  • Burning, itching, and gritty sensations.
  • Swollen eyelids and sensitivity to light.
  • Symptoms often start in one eye and spread to the other.

How Is Eye Flu Diagnosed?

Doctors diagnose eye flu based on symptoms and an eye exam. They look for redness, watery discharge, and swollen lymph nodes near the ears. A slit lamp exam helps rule out other causes such as bacterial infection or allergy. Most cases do not require lab testing, but swabs may be used during severe outbreaks. Diagnosis focuses on confirming the viral nature of the infection.

How Is Eye Flu Treated?

There is no specific antiviral treatment for most cases of eye flu. Doctors recommend cool compresses, lubricating drops, and avoiding contact lenses until symptoms resolve. Good hygiene reduces spread to others. Severe cases may need prescription drops to manage inflammation. People should avoid sharing towels, makeup, or pillowcases during the infection.

Frequently Asked Questions About Eye Flu

Is eye flu contagious?

Yes. Viral conjunctivitis spreads easily through tears, contaminated hands, and shared items. Handwashing helps reduce transmission.

How long does viral conjunctivitis last?

Most cases improve in 1 to 2 weeks, although mild irritation may continue longer.

Can I wear contacts during eye flu?

No. Contact lenses can worsen symptoms and increase the risk of complications. It is best to wait until the eyes fully heal.

When should I see a doctor for eye flu?

You should seek care if symptoms are severe, last more than 2 weeks, or come with vision changes or strong pain.