The Claim
Urban schoolchildren in China spend a greater proportion of their after-school time in excessively close near work (≤30 cm) than rural schoolchildren, with 49% of near-work time occurring at this distance compared to 40% in rural peers, indicating higher visual strain during non-school hours.
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.
Urban schoolchildren in China spend more of their after-school time doing close-up work within 30 centimeters of their eyes than rural schoolchildren, with 49% of their near-work time at this distance versus 40% in rural areas.
See the scientific wording
Urban schoolchildren in China spend a greater proportion of their after-school time in excessively close near work (≤30 cm) than rural peers, with 49% of near-work time occurring at this distance versus 40%, indicating higher visual strain during non-school hours.
When children hold books or screens very close to their eyes, the muscles inside the eye tighten continuously to keep the image focused, which puts constant pressure on the eye's shape and leads to visual strain.
What the research says
1 studyKids in Chinese cities hold their books and screens closer to their eyes after school than kids in the countryside—nearly half the time, compared to 4 in 10 times—and the study measured this with special gadgets to prove 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.