I do think vision habits matter for near sightedness. The human eye, like all mammal eyes, seems adapted for far vision. To bring the focal point in, the ciliary muscle must contract to change the shape of the eye. When it relaxes, the focal point goes back out far away.
In the environment for which we are adapted, most time was spent focusing far away. In the modern world, a person may spend all day, every day, for years on end, focusing on things close up like books and screens. If the ciliary muscle is always contracted, it can get stuck; over time, even change the shape of the eyeball from constant pressure such that the cornea focuses too far in front of the retina, making the image blurry.
Perhaps I was too quick to get glasses when things first started looking blurry. If I had known, I would have tried to get the ciliary muscle to relax by focusing on things far away for at least a time every day. Instead, I went right to the minus lenses but kept my lifestyle of close up work all the time. This led to hyperopic defocus, meaning my ciliary muscle had to continue to contract to focus on near objects through the minus lens.
About 7 years ago I had the thought of improving my vision habits. I will spare HN the details, but my vision (optometrist confirmed) has improved from about -3.5 diopters to -2.25 diopters. I can now do things without glasses including working on the computer, cooking, and reading, for which I am grateful.
I wore glasses for 20+ years before adopting contacts at age 30. I had to learn how to change focus because the depth of field is less compressed than it is with glasses. It was a notable effort for the first few weeks until my eyes adapted.
Now I have early stage presbyopia which is only an issue for reading small text. I'm grateful I can just pop out the lenses and get spectacular near vision when I need it. It's great for watching video on a 5" cell phone because you can hold it close enough to fill your field of view and don't have to support the mass of a larger phone when lying down.
~possible but I've read a research that the most impact for children is simply more outdoor time. There's a pdf of a Piano Tuner Association recommending the use of reading glasses when working in close distance.
I believe there should be wider recommendation to strongly discourage using myopia glasses for computer/reading. I've been wearing it since I was 7 (> 15 years) with a lot of reading, phone and computer usage, no ~big changes in my myopia but not better too. (Disclaimer, my glasses have always been pretty weak (<2))
I've also mistakenly overcorrected my latest pair, so I'll experiment with a astigmatism-only pair to see how much I need correction.
probably not a good idea because it would introduce more problems related to convergence and accommodation, better to just let the eyes work naturally and keep better habits.
In the environment for which we are adapted, most time was spent focusing far away. In the modern world, a person may spend all day, every day, for years on end, focusing on things close up like books and screens. If the ciliary muscle is always contracted, it can get stuck; over time, even change the shape of the eyeball from constant pressure such that the cornea focuses too far in front of the retina, making the image blurry.
Perhaps I was too quick to get glasses when things first started looking blurry. If I had known, I would have tried to get the ciliary muscle to relax by focusing on things far away for at least a time every day. Instead, I went right to the minus lenses but kept my lifestyle of close up work all the time. This led to hyperopic defocus, meaning my ciliary muscle had to continue to contract to focus on near objects through the minus lens.
About 7 years ago I had the thought of improving my vision habits. I will spare HN the details, but my vision (optometrist confirmed) has improved from about -3.5 diopters to -2.25 diopters. I can now do things without glasses including working on the computer, cooking, and reading, for which I am grateful.