Sun Feb 23 05:59:48 UTC 2025: ## One Hour of Daily Screen Time Linked to Increased Risk of Nearsightedness

**New York, NY** – A new study published in *JAMA Network Open* reveals a significant link between daily digital screen time and the development of myopia, or nearsightedness. Researchers analyzed data from over 335,000 participants across 45 investigations, finding that just one hour of daily screen time on tablets or smartphones increases the odds of myopia by 21 percent.

The study, a systematic review and dose-response meta-analysis, showed a clear dose-response relationship: the risk of myopia increased steadily with screen time up to four hours. However, there was no significant association found for screen time under one hour, suggesting a possible safety threshold. Beyond four hours, the increase in risk leveled off.

This research highlights the growing concern over the global rise in nearsightedness, largely attributed to increased digital screen usage. The findings are expected to provide valuable guidance for clinicians in addressing this public health issue. While the study focuses on the link between screen time and myopia, the researchers also acknowledge broader health concerns associated with prolonged screen use, including decreased attention span, poor posture, and potential risks of obesity and musculoskeletal problems. The study emphasizes the importance of responsible digital device usage, particularly for children and young adults.

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