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American Focus > Blog > Health and Wellness > Research shows just one hour of screen time increases risk of nearsightedness
Health and Wellness

Research shows just one hour of screen time increases risk of nearsightedness

Last updated: March 2, 2025 10:50 am
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Research shows just one hour of screen time increases risk of nearsightedness
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Technology has become an integral part of our daily lives, with smartphones, tablets, and other digital screens being used for various activities. However, a new study suggests that spending too much time staring at screens can significantly increase the risk of nearsightedness.

According to a recent review published in JAMA Network Open, researchers found that for every hour spent on digital screens, the odds of developing myopia, or nearsightedness, increased by 21%. The risk continued to escalate with more screen time, doubling for individuals who spend four or more hours with screens daily.

The study, led by Young Kook Kim from the Seoul National University College of Medicine in South Korea, highlights a potential safety threshold of less than one hour per day of screen exposure. By 2050, nearly half of the global population is expected to be nearsighted, with environmental factors such as increased near-vision activities and reduced outdoor time playing a significant role.

Smartphones and other digital devices have introduced new forms of near-work activities, especially among children who are increasingly using these devices at younger ages. The researchers emphasize the importance of understanding the association between digital screen time and myopia to prevent the surge in cases.

Pooling data from 45 previous studies involving over 335,000 individuals, the researchers found a dose-response association between screen time and nearsightedness. This risk is independent of other near-vision tasks like reading or writing, suggesting that reducing screen time alone may not be an effective prevention strategy.

Instead, the researchers advocate for minimizing overall near-work activities while promoting increased outdoor time as a more effective approach to mitigating the risk of myopia. By encouraging a balance between screen time and outdoor activities, individuals can potentially reduce their risk of developing nearsightedness.

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For more information on nearsightedness and prevention strategies, you can visit the American Academy of Ophthalmology website. The study, titled “Digital Screen Time and Myopia: A Systematic Review and Dose-Response Meta-Analysis,” is available in JAMA Network Open for further reading.

In conclusion, while technology offers numerous benefits, it’s essential to be mindful of the impact of excessive screen time on eye health. By finding a balance between digital device use and outdoor activities, individuals can take proactive steps to protect their vision and reduce the risk of nearsightedness.

This article is based on a report by HealthDay, and all rights are reserved for the year 2025. Please refer to the original source for citation and copyright details.

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