"In the early 2000s, when researchers started to look at specific behaviours, such as books read per week or hours spent reading or using a computer, none seemed to be a major contributor to myopia risk. But another factor did. In 2007, Donald Mutti and his colleagues at the Ohio State University College of Optometry in Columbus reported the results of a study that tracked more than 500 eight- and nine-year-olds in California who started out with healthy vision. The team examined how the children spent their days, and “sort of as an afterthought at the time, we asked about sports and outdoorsy stuff”, says Mutti.

It was a good thing they did. After five years, one in five of the children had developed myopia, and the only environmental factor that was strongly associated with risk was time spent outdoors."

"Rose's team tried to eliminate any other explanations for this link — for example, that children outdoors were engaged in more physical activity and that this was having the beneficial effect. But time engaged in indoor sports had no such protective association; and time outdoors did, whether children had played sports, attended picnics or simply read on the beach. And children who spent more time outside were not necessarily spending less time with books, screens and close work. “We had these children who were doing both activities at very high levels and they didn't become myopic,” says Rose. Close work might still have some effect, but what seemed to matter most was the eye's exposure to bright light."

https://www.nature.com/news/the-myopia-boom-1.17120?fbclid=IwAR0V9DHZTpo0s-aFVYX...

What bullshit, not everyone has perfect vision and as people grow they go through changes including their eyesight. Reading in bad light only causes eyestrain and causes no permanent damage either. Spending more time outside has many advantages but doesn't prevent myopia.

Mortdooley wrote on Feb 18^th, 2020 at 12:41am:


The study suggests that spending more time outside does prevent myopia.

The leading hypothesis is that light stimulates the release of dopamine in the retina, and this neurotransmitter in turn blocks the elongation of the eye during development.

Environmental influences 'eyesight'.
Aboriginals (mostly outback ones) are renowned for having great visual spacial reflexes. No 'ball-shy-blink' by them and they became great boxers because of their visual reflex. Mythologist Joseph Campbell has gone into this about 'eyesight' for tribes on plains and in jungles.

People now seem to look like autistic zombies because of all the 'sitting and just staring' at Screens (TV's, Computers) and long driving periods sitting and staring out a windscreen.

These things all do have an effect and influence on consecutive generations under such influences.

There is never only 'one' right answer.

UnSubRocky wrote on Jul 11^th, 2020 at 3:13pm:

Wow. Didn't know that.
I know Margarine, isn't good for eyesight.

I walked past a nude young woman in Autumn on a nice day at the beach. She laughed when I said aloud to her 10m away

"I'm blind! I'm blind!!"

and walked in the water to 'cool off'.