YSK: even modest increases in time spent outdoors significantly reduces a child's odds of developing short-sightedness

As [one meta-analysis](https://pmc.ncbi.nlm.nih.gov/articles/PMC5599950/) put it:
> It’s estimated that an increase of one hour per day of outdoor time could reduce the occurrence of myopia in children by 45%.

Make sure your kids spend time outside, folks!