5 ms·

> if you do a lot of near-work it can think you are still hyperopic, causing further myopia progression. Does this mean we should let our eyes see blurred imag

by jxy 2y ago

> if you do a lot of near-work it can think you are still hyperopic, causing further myopia progression. Does this mean we should let our eyes see blurred images so our eyes would feel like they are seeing far away stuff and stop axial eye growth to stop myopia. This is in direct contrast to the claim in the post > a few minutes a day with glasses or contact lenses that correct for blur stops the progression of myopia which believes corrective lenses that correct for blur would stop the progression of myopia.

walterbell 2y ago
Note the references to color in the 2022 Nature paper: > Here we show that, even though filtered movies looked similar, eyes became significantly shorter when the movie was sharp in the red plane but became longer when it was presented sharp in the blue plane. Strikingly, the eyes of young subjects who were already myopic did not respond at all—showing that their retina could no longer decode the sign of defocus based on LCA. Our findings resolve a long-standing question as to how the human retina detects the sign of defocus. It also suggests a new non-invasive strategy to inhibit early myopia development: keeping the red image plane on a computer screen sharp but low pass filtering the blue.
- thriftwy 2y ago
  Okay that's great, except children get their myopia before they become casual laptop users. I wonder if doing the same to TVs and tablets will do anything.
  - walterbell 2y ago
    From the Show HN submission above: > Some myopia control techniques work similarly, like MiSight and Hoya lenses. MiSight is a contact lens used to slow myopia progression in children, aged 8-12 at the initiation of treatment.
    - thriftwy 2y ago
      What I don't like in this is the defeatist attitude of "slowing myopia progression". If you have myopia, your life experience is already ruined, and it's not very much relevant whether it's -2 or -6. You're stuck with glasses either way so why bother "slowing it". Yes you can get retinal detachment but on average you won't. I'm not even sure I can be bothered to spend effort on "slowing myopia progression" in my children by annoying treatments such as contact lenses or applying topical chicken guano, unless there are serious concerns. If you already have myopia just live with it. I would love for them to not have any myopia at all and perfect vision, though. Just very unlikely provided that basically everybody in my family wears glasses.
      - walterbell 2y ago
        > defeatist attitude of "slowing myopia progression" The global optical business is on the order of $100B in annual revenue. Reversing or preventing myopia has less economic support, but research continues. > it's not very much relevant whether it's -2 or -6 Smaller corrections can use CR-39 or even glass, with high optical quality. Lenses for larger myopia corrections become too thick with CR-39 material, requiring "high index" plastics. These have more cost and optical distortion. Smaller corrections are also more amenable to contact lenses.

by jxy 2y ago

walterbell 2y ago

Note the references to color in the 2022 Nature paper: > Here we show that, even though filtered movies looked similar, eyes became significantly shorter when the movie was sharp in the red plane but became longer when it was presented sharp in the blue plane. Strikingly, the eyes of young subjects who were already myopic did not respond at all—showing that their retina could no longer decode the sign of defocus based on LCA. Our findings resolve a long-standing question as to how the human retina detects the sign of defocus. It also suggests a new non-invasive strategy to inhibit early myopia development: keeping the red image plane on a computer screen sharp but low pass filtering the blue.

thriftwy 2y ago
Okay that's great, except children get their myopia before they become casual laptop users. I wonder if doing the same to TVs and tablets will do anything.
- walterbell 2y ago
  From the Show HN submission above: > Some myopia control techniques work similarly, like MiSight and Hoya lenses. MiSight is a contact lens used to slow myopia progression in children, aged 8-12 at the initiation of treatment.
  - thriftwy 2y ago
    What I don't like in this is the defeatist attitude of "slowing myopia progression". If you have myopia, your life experience is already ruined, and it's not very much relevant whether it's -2 or -6. You're stuck with glasses either way so why bother "slowing it". Yes you can get retinal detachment but on average you won't. I'm not even sure I can be bothered to spend effort on "slowing myopia progression" in my children by annoying treatments such as contact lenses or applying topical chicken guano, unless there are serious concerns. If you already have myopia just live with it. I would love for them to not have any myopia at all and perfect vision, though. Just very unlikely provided that basically everybody in my family wears glasses.
    - walterbell 2y ago
      > defeatist attitude of "slowing myopia progression" The global optical business is on the order of $100B in annual revenue. Reversing or preventing myopia has less economic support, but research continues. > it's not very much relevant whether it's -2 or -6 Smaller corrections can use CR-39 or even glass, with high optical quality. Lenses for larger myopia corrections become too thick with CR-39 material, requiring "high index" plastics. These have more cost and optical distortion. Smaller corrections are also more amenable to contact lenses.