3 ms·

Any way to maintain flexibility through diet and exercise?

by xwdv 6y ago

mlyle 6y ago
I don't believe so. It's my understanding that the protein structures that make the lens so flexible-- mostly alpha-crystallin --- are created during the development of the eye and slowly lost over time. Later, transparency is lost in the cornea for similar reasons and we get cataracts. Then with cataract surgery you can choose your preferred focal length for your new stiff artificial lens.
- xwdv 6y ago
  Fuck man, this sucks. How come some people manage to still not need glasses past 50 then? What did they do different?
  - benjohnson 6y ago
    I'm in that category - I've noticed is that me and other mountain climbers and hikers seem to age better. Could be selection bias - the unhealthy with poor eyesight could have quit or fallen off a ledge.
    - mlyle 6y ago
      I doubt that that's a key factor. There's a lot of luck on initial refractive error, etc. I don't need reading glasses. One reason is I have one eye with a slightly near refractive error and one with a slightly far refractive error. They're also both pretty close to nominal, so losing a bit of range on focusing doesn't hurt as much as if I'd been biased one way or another. I do notice that I prefer slightly larger text than before. I bet if I tried reading glasses that I'd find that they lend some benefit.
    - inglor_cz 6y ago
      I notice that after a long hike in the mountains, I can see a bit better. The effect stays for several hours. Probably the eyes need some training too, refocusing onto near and far objects frequently. We live in a computer screen world, this is very unnatural for our eyes.
      - xwdv 6y ago
        Maybe it’s from focusing to infinity for a long period of time.
chordalkeyboard 6y ago
Is there an incentive to perform peer-reviewed, triple-blind, controlled studies on people to see if diet and exercise helps? Then there's no way to know.
- jtsiskin 6y ago
  *quadruple blind. The subjects in this study are blind as well.

Any way to maintain flexibility through diet and exercise?

by xwdv 6y ago

Any way to maintain flexibility through diet and exercise?

I don't believe so. It's my understanding that the protein structures that make the lens so flexible-- mostly alpha-crystallin --- are created during the development of the eye and slowly lost over time. Later, transparency is lost in the cornea for similar reasons and we get cataracts. Then with cataract surgery you can choose your preferred focal length for your new stiff artificial lens.

xwdv 6y ago
Fuck man, this sucks. How come some people manage to still not need glasses past 50 then? What did they do different?
- benjohnson 6y ago
  I'm in that category - I've noticed is that me and other mountain climbers and hikers seem to age better. Could be selection bias - the unhealthy with poor eyesight could have quit or fallen off a ledge.
  - mlyle 6y ago
    I doubt that that's a key factor. There's a lot of luck on initial refractive error, etc. I don't need reading glasses. One reason is I have one eye with a slightly near refractive error and one with a slightly far refractive error. They're also both pretty close to nominal, so losing a bit of range on focusing doesn't hurt as much as if I'd been biased one way or another. I do notice that I prefer slightly larger text than before. I bet if I tried reading glasses that I'd find that they lend some benefit.
  - inglor_cz 6y ago
    I notice that after a long hike in the mountains, I can see a bit better. The effect stays for several hours. Probably the eyes need some training too, refocusing onto near and far objects frequently. We live in a computer screen world, this is very unnatural for our eyes.
    - xwdv 6y ago
      Maybe it’s from focusing to infinity for a long period of time.

chordalkeyboard 6y ago

Is there an incentive to perform peer-reviewed, triple-blind, controlled studies on people to see if diet and exercise helps? Then there's no way to know.

jtsiskin 6y ago
*quadruple blind. The subjects in this study are blind as well.