A new study finds myopia, also known as nearsightedness, is much more common among children and teens today than it was 40 years ago.
But spending time outside could help reverse this trend.
Authors of the study argue that increased exposure to natural light and more time spent looking at objects from afar just might protect a child's vision.
The protective effect is linked to just being outside, not engaging in specific activities.
The study was presented at the American Academy of Ophthalmology meeting in Florida.
Scientists say they would like to see more research in this area to confirm these findings.