Medical justification against screen time: For planning my 2yo daughter's vision development, her opthalmologist just said something like, kids have more nearsightedness these days, with all this close attention. I asked if it was the devices. She said it was more like we're spending less time outside these days, so she recommends: 2 hours a day outdoors, and breaks from screen time: a 20s break from every 20-30 min of screen time, or getting up to stretch and counting to 100, and that it could slow becoming nearsighted.

this is a huge deal in singapore for exactly the screen/indoors time reasons https://www.zeiss.com/myopia/en/articles--insights/myopia-in-singapore.html