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Rachel V Thomas

H1N1 and Sudden Vision Changes: When Flu-Related Eye Symptoms Need Medical Attention

H1N1 And Sudden Vision Changes: When Flu-Related Eye Symptoms Need Medical Attention

Amid a significant surge in <span>H1N1</span> cases in India, experts say the flu can affect more than just the respiratory system—it can also cause eye symptoms. 

H1N1, a strain of <span>influenza A virus</span>, is usually associated with fever, cough, sore throat, body ache, fatigue and other respiratory symptoms. It spreads mainly through respiratory droplets when an infected person coughs, sneezes or talks. However, influenza can sometimes affect areas beyond the respiratory system, including the eyes. 

Some people may develop watering, redness, irritation, photophobia or dryness during a flu infection. While these symptoms may improve as the flu resolves, sudden changes in vision should not be ignored. 

Speaking to <strong><em>HealthandMe</em></strong>, Dr. Sfurti Maan, Senior Consultant, Internal Medicine, Shalby International Hospital, said that in most cases, eye symptoms are mild and settle with appropriate care. One of the more noticeable problems is viral <span><a href="https://www.healthandme.com/health/conjunctivitis">conjunctivitis</a></span>. 

“The eyes may become red and watery, with burning, irritation or mild discharge. More intense inflammation may cause swelling of the eyelids or conjunctiva,” the expert said. 

A person may also develop light sensitivity or general discomfort in the eyes. 

Another possible finding is a bright-red patch on the white portion of the eye. This is called a subconjunctival hemorrhage and can sometimes occur after severe coughing or vomiting. 

Most H1N1-related eye problems are limited to conjunctivitis. However, rare cases of deeper eye inflammation, including uveitis, retinitis and optic nerve involvement, have also been reported. These complications are uncommon but can affect vision. 

“If someone has influenza and develops persistent blurred vision, severe eye pain, marked sensitivity to light or a sudden drop in vision, that should not be treated as routine conjunctivitis. These symptoms need an eye examination,” Dr. Sfurti said. 

Dr. Poninder Kumar Dogra, Senior Consultant, Ophthalmology at ShardaCare – Healthcity, said people with influenza should see an ophthalmologist if they experience: 

<ul><li>Sudden loss of vision </li></ul><ul><li>Blurred or double vision </li></ul><ul><li>Flashes of light </li></ul><ul><li>An increase in eye floaters </li></ul><ul><li>Vision problems when looking close up </li><li></li></ul>These symptoms may not always be due to H1N1 affecting the eyes and could indicate another eye condition requiring prompt management. An ophthalmologist should also be consulted for: 

<ul><li>Substantial eye pain </li></ul><ul><li>Intense redness or redness around the eye </li></ul><ul><li>An unusual increase in photophobia with discharge </li></ul>

<h2>What About Contact Lens Wearers? </h2>

Contact lens wearers may develop eye pain, redness and changes in vision. Contacts should not be worn, and an eye examination should be arranged until the eyes have been investigated and an ophthalmic practitioner says they can be worn again. 

Fluid loss, dehydration and fever during the flu can cause dryness and discomfort. Various medications may also cause dry eyes. 

<h2>How Can You Prevent Eye Symptoms? </h2>

Annual flu vaccination is one of the key ways to reduce the risk of influenza. Others include: 

<ul><li>Good hand hygiene,  </li><li>covering the mouth and nose while coughing or sneezing,  </li><li>avoiding close contact with people who are sick  </li><li>staying home when unwell. </li></ul>

Dr. Sfurti advised people with flu symptoms to also avoid touching or rubbing their eyes, particularly with unwashed hands. If conjunctivitis is present, sharing towels, tissues, pillows or personal eye-care products should also be avoided. 

“It is important not to panic just because H1N1 can affect the eyes. Serious ocular complications are very rare. The important thing is to recognise the warning signs. If there are only redness, watering and mild irritation, it is usually not a reason for alarm. But any significant change in vision deserves prompt medical attention.” 

Dr. Poninder told <strong><em>HealthandMe </em></strong>that antibiotic drops or steroids should never be self-prescribed without seeing an ophthalmologist, as they can potentially delay diagnosis or affect the diagnosis of another condition. 

Redness with a slight amount of discharge, discomfort or irritation with transient dryness that gradually resolves may not require an ophthalmologist referral. However, sudden loss of vision, intense pain, extreme redness and progressing inflammation should be checked. 

Health Conditions A-Z

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Amid a significant surge in H1N1 cases in India, experts say the flu can affect more than just the respiratory system—it can also cause eye symptoms. H1N1, a strain of influenza A virus, is usually associated with fever, cough, sore throat, body ache, fatigue and other respiratory symptoms. It spreads mainly through respiratory droplets when an infected person coughs, sneezes or talks. However, influenza can sometimes affect areas beyond the respiratory system, including the eyes. Some people may develop watering, redness, irritation, photophobia or dryness during a flu infection. While these symptoms may improve as the flu resolves, sudden changes in vision should not be ignored. How Does H1N1 Affect the Eyes? Speaking to HealthandMe, Dr. Sfurti Maan, Senior Consultant, Internal Medicine, Shalby International Hospital, said that in most cases, eye symptoms are mild and settle with appropriate care. One of the more noticeable problems is viral conjunctivitis. “The eyes may become red and watery, with burning, irritation or mild discharge. More intense inflammation may cause swelling of the eyelids or conjunctiva,” the expert said. A person may also develop light sensitivity or general discomfort in the eyes. Another possible finding is a bright-red patch on the white portion of the eye. This is called a subconjunctival hemorrhage and can sometimes occur after severe coughing or vomiting. When Should You See A Doctor? Most H1N1-related eye problems are limited to conjunctivitis. However, rare cases of deeper eye inflammation, including uveitis, retinitis and optic nerve involvement, have also been reported. These complications are uncommon but can affect vision. “If someone has influenza and develops persistent blurred vision, severe eye pain, marked sensitivity to light or a sudden drop in vision, that should not be treated as routine conjunctivitis. These symptoms need an eye examination,” Dr. Sfurti said. Dr. Poninder Kumar Dogra, Senior Consultant, Ophthalmology at ShardaCare – Healthcity, said people with influenza should see an ophthalmologist if they experience: Sudden loss of vision Blurred or double vision Flashes of light An increase in eye floaters Vision problems when looking close up These symptoms may not always be due to H1N1 affecting the eyes and could indicate another eye condition requiring prompt management. An ophthalmologist should also be consulted for: Substantial eye pain Intense redness or redness around the eye An unusual increase in photophobia with discharge What About Contact Lens Wearers? Contact lens wearers may develop eye pain, redness and changes in vision. Contacts should not be worn, and an eye examination should be arranged until the eyes have been investigated and an ophthalmic practitioner says they can be worn again. Fluid loss, dehydration and fever during the flu can cause dryness and discomfort. Various medications may also cause dry eyes. How Can You Prevent Eye Symptoms? Annual flu vaccination is one of the key ways to reduce the risk of influenza. Others include: Good hand hygiene,  covering the mouth and nose while coughing or sneezing,  avoiding close contact with people who are sick  staying home when unwell. Dr. Sfurti advised people with flu symptoms to also avoid touching or rubbing their eyes, particularly with unwashed hands. If conjunctivitis is present, sharing towels, tissues, pillows or personal eye-care products should also be avoided. “It is important not to panic just because H1N1 can affect the eyes. Serious ocular complications are very rare. The important thing is to recognise the warning signs. If there are only redness, watering and mild irritation, it is usually not a reason for alarm. But any significant change in vision deserves prompt medical attention.” Dr. Poninder told HealthandMe that antibiotic drops or steroids should never be self-prescribed without seeing an ophthalmologist, as they can potentially delay diagnosis or affect the diagnosis of another condition. Redness with a slight amount of discharge, discomfort or irritation with transient dryness that gradually resolves may not require an ophthalmologist referral. However, sudden loss of vision, intense pain, extreme redness and progressing inflammation should be checked. 

h1n1 and sudden vision changes: when flu-related eye symptoms need medical attention

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