The Claim
Children who spend more than 3 hours per day on near-work activities have a median axial length of 23.57 mm at age 12, which is significantly longer than the median axial length of 23.29 mm in children who spend less than 3 hours per day on near-work activities.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
At age 12, children who spend more than three hours daily on close-up tasks like reading or screen use have longer eyeballs on average than children who spend less time on these tasks.
See the scientific wording
Children who spend more than 3 hours per day on near-work activities have significantly longer baseline axial lengths at age 12 (median 23.57 mm) compared to those with less than 3 hours (median 23.29 mm), suggesting a possible association between prolonged near-work and pre-existing eye elongation before the study period.
When children spend less time outdoors, their eyes receive less natural light, which reduces a chemical in the retina called dopamine. Lower dopamine levels allow the back of the eye to soften and stretch longer, making the eyeball grow bigger from front to back.
What the research says
1 studyStudy: Myopia Progression Risk: Seasonal and Lifestyle Variations in Axial Length Growth in Czech Children
Kids who read or used screens a lot already had slightly longer eyeballs before the study started, even though their eyes didn’t grow faster during the study. So the study suggests longer eyes might come before lots of screen time, not because of it.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.