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[-] chonglibloodsport@lemmy.world 0 points 8 months ago

Pretty funny! But the reason so many people need glasses is because we spend all our time indoors, reading. People in the past were outside working all the time and they didn’t need glasses as a result.

[-] pumpkinseedoil@feddit.de 12 points 8 months ago

I was born with bad eyes. People back then also were born with bad eyes but couldn't do anything about it.

Obviously you can also get bad eyes (shortsighted) when always only focusing on short distances but it's not the only way. Most people also become far sighted when they get older (the pressure inside your eye lowers and therefore your eye becomes shorter)

[-] SadSadSatellite@lemmy.dbzer0.com 16 points 8 months ago

Focusing close regularly doesn't make you short sighted, not getting enough tourquoise light on your retina from staying inside makes your eye keep getting longer instead of stopping when the focal point is correct. Well, that and genetics.

And losing the ability to see near as you age has nothong to do with pressure. Your lens is constantly adding new layers to itself to stay clear, and after 40 it's become so thick the muscles that pull it to accommodate near vision can't stretch it enough. By 58 it doesn't stretch at all any more. That's why everyone eventually needs bifocals/progressives.

Don't state things as fact if your not sure of them.

Source: ABOA, NCLE, OD, I own two optical practices.

[-] insufferableninja 1 points 8 months ago

so... lens shaving to prevent lens rigidity?

[-] SadSadSatellite@lemmy.dbzer0.com 1 points 8 months ago

No way to leave it perfectly clear, symetrical, perfectly powered, aimed precisely, and get to it before the tiny muscles atrophy.

The lens doesn't really heal, so you can't just cut it like a cornea. It's also really hard to get to withoit mwssing everything else up.

There's currently some scientists working on a flexible, corrected replacement lens. They started human testing like 7 years ago, and i never heard anything about it again, so i'm assuming it hasn't gone well.

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this post was submitted on 16 Apr 2024
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