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That’s the first time I’ve heard of that, so I clicked the link. It’s a fascinating, and rather distressing, study in chickens, that does not say what the article claims at all.
There is an actual, properly tested (in humans!) childhood intervention that is effective, though: low dose atropine. I’m surprised it wasn’t mentioned. https://www.aao.org/eyenet/article/how-to-use-low-dose-atrop...
I bet most people's guess would also be off by 1 or 2 orders of magnitude.
Even outdoors in the shade, it is over 50X brighter than indoors.
(For specific numbers and comparisons, see: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6656201/ )
Apparently, our eyes adjust so quickly to the difference that we have a very poor sense of the magnitude of light change between indoors and outdoors.
I bring this up because one of the largest factors in myopia development appears to be outdoor light exposure in childhood.
Genetics are likely a factor too, but light exposure seems to have a huge effect: "The prevalence of myopia in 6- and 7-year-old children of Chinese ethnicity was significantly lower in Sydney (3.3%) than in Singapore (29.1%), while patterns of daily outdoor light exposure showed that children living in Singapore were exposed to significantly less daily outdoor light than Australian children." (from the same study linked above)
The obvious takeaway for parents, schools, and governments: ensure your children have plenty of outdoor playtime. It will greatly reduce instances of myopia (not to mention the benefits from higher Vitamin D levels, exercise, etc).
(This is a repost of my comment from 3 years ago on the same topic: https://news.ycombinator.com/item?id=25909557 )
> There is a small neural network on the retina that tries to detect if the eye is far-sighted (most people are born far-sighted), and it is producing dopamine to slow or increase eye growth rate. It is not very smart, and if you do a lot of near-work it can think you are still hyperopic, causing further myopia progression. So, based on the refractive properties of the eye the software calculates the signal that would convince the retinal neural network that the eye is long enough, so it would produce dopamine, a known signal to stop axial eye growth. (based on myopic defocus LCA from the papers[2][3])
Refractify is the worlds first software to apply myopic defocus effect on the screen. Pre-clinical studies suggest that it may slow the progression of myopia or even prevent it. This makes the screen look on the retina naturally as if it was at a greater distance. This is possible because there are slight detectable differences in the statistical properties of the light depending on how far it is coming from due to Longitudinal Chromatic Aberration(LCA) and other effects. LCA simulation is being used in computer graphics since at least 2017 to enhance depth perception, but only recently has it gained research interest for its myopia prevention properties.
[2] https://www.nature.com/articles/s41598-022-26323-7[3] https://www.sciencedirect.com/science/article/abs/pii/S00144...
https://archive.is/ybLnZ