Cell phone blindness, also known as transient smartphone blindness or transient monocular visual loss, refers to temporary vision impairment caused by the excessive use of smartphones. This condition typically affects individuals who use their smartphones in bed at night with one eye covered (for example, when lying on their side). The uncovered eye, which is exposed to the bright light from the screen, adapts to the light, while the covered eye remains adapted to the dark. When both eyes are exposed to the same lighting conditions again, the previously covered eye may take longer to adjust, resulting in temporary vision impairment.
Symptoms
Temporary vision loss in one eye: Sudden but brief loss of sight in one eye after using a smartphone, says Dheeraj Nagar, an eye specialist and senior consultant with Apollo.
Blurred vision: Difficulty seeing clearly, with images appearing fuzzy or indistinct.
Eye strain or discomfort: Feeling of tiredness or pain in the eyes after prolonged screen use.
Sensitivity to light: Increased discomfort or pain when exposed to bright lights or glare, says Nagar.
Reducing the risk of cell phone blindness
Avoid using phones in the dark: Use smartphones in well-lit environments to prevent a stark contrast between the screen and surrounding darkness.
Use night mode or blue light filters: Activate night mode or blue light filters on your smartphone to reduce the amount of blue light emitted, which can be harsh on the eyes, especially in low light conditions.
Take frequent breaks: Follow the 20-20-20 rule, every 20 minutes, look at something 20 feet away for at least 20 seconds to reduce eye strain.
Adjust screen brightness: Set your screen brightness to match the ambient lighting. Avoid excessive brightness or complete darkness.
Maintain proper viewing distance: Hold your smartphone at a comfortable distance (about 16-18 inches away from your eyes) to reduce strain.
Use both eyes: Ensure that both eyes are equally exposed to the screen light. Avoid lying on your side while using your phone, as this may lead to one eye being covered.
Limit screen time: Reduce overall screen time, especially before bedtime, to give your eyes a rest and avoid disrupting your sleep patterns.
Regular eye check-ups: Schedule regular eye examinations to monitor and maintain eye health, and to address any issues early on, says Nagar.
Eye exercises: Perform regular eye exercises to strengthen eye muscles and reduce strain.
By following these guidelines, you can help reduce the risk of cell phone blindness and maintain better eye health in the digital age.
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