Staring into small visual apertures like phone or laptop screens for extended periods can cause the eyeball to lengthen, leading to myopia.

“I couldn't agree more, and I think a lot of I'll even venture so far as to say that a lot of the visual deficits that we now see in young people, myopia, literally nearsightedness, occurs because if we look at things that are too close to us as children or as adults, the eyeball actually gets longer. The lens focuses the visual image in front of nearer to the lens, nearsighted, than in front of where it should land. And basically, it's a lack of panoramic vision that is or open awareness that's driving these changes.”