4 ms·

OT the most introverted people I know are also the most near-sighted. It got me to wondering if introversion is a protection in nature for near-sightedness.

by dd36 5y ago

gryn 5y ago
more likely the opposite, nearsightedness is related to a lack of exposure of the eye to sunlight during childhood. introverted people are more likely to spend time indoor (away from the UV of sunlight) which lead to your observed correlation.
- JrProgrammer 5y ago
  Do you have any sources on this?
  - sndean 5y ago
    Not sure about the correlation with being introverted, but the sunlight-nearsightedness correlation is pretty well established [0], specifically light in the near ultraviolet range [1]. There was a really interesting article on HN years ago about this, but I can't find it. The researchers suggested this effect was a good reason to mandate outdoor recess for children during the school day – maybe in Australia? [0] https://insights.osu.edu/health/myopia https://insights.osu.edu/health/myopia [1] https://www.thelancet.com/journals/ebiom/article/PIIS2352-3964(17)30020-8/fulltext https://www.thelancet.com/journals/ebiom/article/PIIS2352-39...
  - deleted 5y ago
    [deleted]
- dd36 5y ago
  What? None of the near-sighted people in my family spent more than normal time indoors. Likely the opposite. We were always outside.
- fpoling 5y ago
  I have high myopia and I had plenty of outdoor time in my childhood on par or even higher than my buddies who did not developed myopia. Less anecdotal evidence is prevalence of myopia in south-east Asia where people have more exposure to bright sun than in Europe. My pet hypothesis about myopia is exposure to high glycemic food like white rice or white bread that simulate growth just little bit too much that is enough to develop the eye few microns too big and cause myopia. But that hypothesis also has a lot of issues.
NazakiAid 5y ago
I would have throught this would be the case because introverts are more likely not needing to look far due to staying indoors most the time (and in my case, staring at monitors). Which means the eyes won't be getting "exercised" to look far.

OT the most introverted people I know are also the most near-sighted. It got me to wondering if introversion is a protection in nature for near-sightedness.

by dd36 5y ago

OT the most introverted people I know are also the most near-sighted. It got me to wondering if introversion is a protection in nature for near-sightedness.

gryn 5y ago

more likely the opposite, nearsightedness is related to a lack of exposure of the eye to sunlight during childhood. introverted people are more likely to spend time indoor (away from the UV of sunlight) which lead to your observed correlation.

JrProgrammer 5y ago
Do you have any sources on this?
- sndean 5y ago
  Not sure about the correlation with being introverted, but the sunlight-nearsightedness correlation is pretty well established [0], specifically light in the near ultraviolet range [1]. There was a really interesting article on HN years ago about this, but I can't find it. The researchers suggested this effect was a good reason to mandate outdoor recess for children during the school day – maybe in Australia? [0] https://insights.osu.edu/health/myopia https://insights.osu.edu/health/myopia [1] https://www.thelancet.com/journals/ebiom/article/PIIS2352-3964(17)30020-8/fulltext https://www.thelancet.com/journals/ebiom/article/PIIS2352-39...
- deleted 5y ago
  [deleted]
dd36 5y ago
What? None of the near-sighted people in my family spent more than normal time indoors. Likely the opposite. We were always outside.
fpoling 5y ago
I have high myopia and I had plenty of outdoor time in my childhood on par or even higher than my buddies who did not developed myopia. Less anecdotal evidence is prevalence of myopia in south-east Asia where people have more exposure to bright sun than in Europe. My pet hypothesis about myopia is exposure to high glycemic food like white rice or white bread that simulate growth just little bit too much that is enough to develop the eye few microns too big and cause myopia. But that hypothesis also has a lot of issues.

NazakiAid 5y ago

I would have throught this would be the case because introverts are more likely not needing to look far due to staying indoors most the time (and in my case, staring at monitors). Which means the eyes won't be getting "exercised" to look far.