Interesting. I also heard that if you sleep with the light on, it increases myopia or at least they claim that chickens in lighted barns are more prone to myopia than free range chickens.
I dont know if I believe this though. I grew up in the country and we were outside more than inside and I had severe myopia. So did my brother who was outside all the time.
There doesn’t seem to be any doubt that myopia is primarily a genetic condition. That said, it’s quite plausible to me that not ever looking far into the distance might cause one’s ability to do so to fall into disuse.
Today many kids even watch tv and movies on their computers, which are set right in front of them as per usual for computers. So they are not even looking across a room from the couch to the tv as they get their screen time.
They have done studies that hildren are myopic or more myopic on the eye closestto the “night light side” of the bed.