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@moth
I'm long-sighted +2 or 3 in both eyes, i.e. the surface of my eyes is too flat, which means blasting bits off the cornea with lasers isn't going to help. (At the moment i can still focus pretty close, but they are also astigmatic, particularly my right, and i'd love to fix that.)
As i understand it, the thing that gets worse with age is that the lens itself gets stiffer, so it gets harder for the muscles around it to flex it to focus.
I read somewhere that cataract surgery is steadily getting better: Initially they just replaced the clouded lens with a solid one (my gran had that done and had to have lots of different sets of glassed for focusing at different distances), but now they are starting to use more flexible replacement lenses so people retain some ability to focus for themselves. I'm hoping that by the time my lenses get too stiff for me to focus, the cataract treatment will have advanced enough to be viable as a general sight-correction procedure even for people without cataracts.