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Maybe these exercises help some people but myopia is largely hereditary. It's worth trying though, it's free.

yorwba 2y ago
Anything that is even slightly hereditary looks "largely hereditary" in the absence of environmental factors. That doesn't mean that large changes in environmental conditions cannot have a large effect on hereditary traits. Body height is largely hereditary if you can avoid malnutrition. But improved nutrition has led to an increase in average height over time. It's not improbable that spending ten hours a day indoors to study could have an effect on myopia in children, even if the variation among children who all study for approximately the same duration appears to be explainable by hereditary factors.
- User23 2y ago
  > Body height is largely hereditary if you can avoid malnutrition. But improved nutrition has led to an increase in average height over time. To be clear, good environment increases the phenotypical expression of genotype. A malnourished population will have lower height variance than a well-fed one ceteris paribus.
  - robwwilliams 2y ago
    Do you have a reference for that? The variance of most traits will increase as the variance and volatility of the environment increases. My guess is that the variance in stature in countries like Holland and Sweden has actually decreased significantly over the last 100 years. Military recruitment records would be the place to start looking. But I honestly do not know the answer. Perhaps I should ask an LLM. But this might be a goid place to start instead. https://ourworldindata.org/human-height https://ourworldindata.org/human-height
xpe 2y ago
> It's worth trying though, it's free. The above claim strays far from the way of logic. Follow that pattern of thinking, and you'll never run out of things to try.
daveguy 2y ago
It's only free if you don't value your own time.
deleted 2y ago
[deleted]
powersnail 2y ago
> Maybe these exercises help some people Similar studies have been conducted in China for multiple times, no clinically significant results were ever found. It probably doesn't help anybody, other than encouraging a short while of not using your eyes. The guy who first invented the exercise basically just made it up from thin air, trying to fix his own myopia, which was a reasonable effort that didn't work out. But for some reason, it caught on in schools nevertheless.
hosh 2y ago
Turns out, myopia isn't hereditary. It has to do with dopamine interactions and the retina receiving outdoor lighting. When there is insufficient outdoor lighting, the retina starts growing in a different shape, leading to myopia. Just let the kids play outside. I don't know if going outside more often will reverse it. Astigmatism, on the other hand, may be hereditary.
- lucb1e 2y ago
  > Just let I don't know about you, but in my case that would have been "just push". RCT1+2 was a lot more fun and even if I would play with the (often mean) village kids, they too were more into video games than ball games, albeit more something like Postal (rated for mature audiences, like ten years older than we were). There was some voluntary playing outside as well as inverse curfews imposed to make sure we don't only game and watch Pokémon inside at some age, but this notion of "just let them do what they enjoy" is so contradictory to my personal experience
  - hosh 2y ago
    In China and Taiwan, where many kids are pushed to study more, outside play would be a treat. Although I don’t know about video games. In the US, the complicating factor is that parents get in trouble for letting kids play unsupervised outside. Both custom and legislation discourages this kind of parenting. There is an advocacy group in the US trying to lobby for legislative protections for parents, so “just let them play outside” means something a bit different.
- lambdaxyzw 2y ago
  >Just let the kids play outside. I did, most of my young life, and I'm still myopic. This can't be so easy
  - thsksbd 2y ago
    At what time? Where? How much? Did you play an hour a day during solar noon? (It would actually be cool to see if myopia rates change along towns near a time zone border -> kids getting out of school during the brighter time of the day)

Anything that is even slightly hereditary looks "largely hereditary" in the absence of environmental factors. That doesn't mean that large changes in environmental conditions cannot have a large effect on hereditary traits. Body height is largely hereditary if you can avoid malnutrition. But improved nutrition has led to an increase in average height over time. It's not improbable that spending ten hours a day indoors to study could have an effect on myopia in children, even if the variation among children who all study for approximately the same duration appears to be explainable by hereditary factors.

User23 2y ago
> Body height is largely hereditary if you can avoid malnutrition. But improved nutrition has led to an increase in average height over time. To be clear, good environment increases the phenotypical expression of genotype. A malnourished population will have lower height variance than a well-fed one ceteris paribus.
- robwwilliams 2y ago
  Do you have a reference for that? The variance of most traits will increase as the variance and volatility of the environment increases. My guess is that the variance in stature in countries like Holland and Sweden has actually decreased significantly over the last 100 years. Military recruitment records would be the place to start looking. But I honestly do not know the answer. Perhaps I should ask an LLM. But this might be a goid place to start instead. https://ourworldindata.org/human-height https://ourworldindata.org/human-height

xpe 2y ago

> It's worth trying though, it's free. The above claim strays far from the way of logic. Follow that pattern of thinking, and you'll never run out of things to try.

daveguy 2y ago

It's only free if you don't value your own time.

deleted 2y ago

[deleted]

powersnail 2y ago

> Maybe these exercises help some people Similar studies have been conducted in China for multiple times, no clinically significant results were ever found. It probably doesn't help anybody, other than encouraging a short while of not using your eyes. The guy who first invented the exercise basically just made it up from thin air, trying to fix his own myopia, which was a reasonable effort that didn't work out. But for some reason, it caught on in schools nevertheless.

hosh 2y ago

Turns out, myopia isn't hereditary. It has to do with dopamine interactions and the retina receiving outdoor lighting. When there is insufficient outdoor lighting, the retina starts growing in a different shape, leading to myopia. Just let the kids play outside. I don't know if going outside more often will reverse it. Astigmatism, on the other hand, may be hereditary.

lucb1e 2y ago
> Just let I don't know about you, but in my case that would have been "just push". RCT1+2 was a lot more fun and even if I would play with the (often mean) village kids, they too were more into video games than ball games, albeit more something like Postal (rated for mature audiences, like ten years older than we were). There was some voluntary playing outside as well as inverse curfews imposed to make sure we don't only game and watch Pokémon inside at some age, but this notion of "just let them do what they enjoy" is so contradictory to my personal experience
- hosh 2y ago
  In China and Taiwan, where many kids are pushed to study more, outside play would be a treat. Although I don’t know about video games. In the US, the complicating factor is that parents get in trouble for letting kids play unsupervised outside. Both custom and legislation discourages this kind of parenting. There is an advocacy group in the US trying to lobby for legislative protections for parents, so “just let them play outside” means something a bit different.
lambdaxyzw 2y ago
>Just let the kids play outside. I did, most of my young life, and I'm still myopic. This can't be so easy
- thsksbd 2y ago
  At what time? Where? How much? Did you play an hour a day during solar noon? (It would actually be cool to see if myopia rates change along towns near a time zone border -> kids getting out of school during the brighter time of the day)