Not all cases of myopia are caused by misshapen eyeballs. There are a few other conditions which can cause nearsightedness. Some will correct on its own, others

Not all cases of myopia are caused by misshapen eyeballs. There are a few other conditions which can cause nearsightedness. Some will correct on its own, others can be corrected by some eye exercises. This would explain why some people have success with these methods. However, if myopia is caused by misshapen eyeballs (the usual cause), then none of those exercises have been observed to be effective in any way. And don't use argument of no economic benefit. There is always something to sell. See the middle link you have posted which is selling a $150/mo subscription to "reverse myopia"