4 ms·

Ive been reading about myopia, mostly some recent work out of japan. Our obsession with 20/20, at distance, seems to be exacerbating the issue. Im not sure tha

Ive been reading about myopia, mostly some recent work out of japan. Our obsession with 20/20, at distance, seems to be exacerbating the issue. Im not sure that these will help. We perhaps need to admit that not everyone needs to shoot a gun, fly an airplane or even drive a car. The japanese work is showing that making things perfect at 20ft often makes the eye contort itself to see at the sub-foot range where most reading occurs. Acceptable vision at closer ranges would be a better standard than forcing perfect vision at distance, or at every distance via glasses that change focus.

deleted 2y ago
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stevebmark 2y ago
Hopefully you've already come across myopic defocus lenses and low dose atropine in your reading about myopia. Overfocus in peripheral vision is a known trigger of myopia progression.
wiseowise 2y ago
> We perhaps need to admit that not everyone needs to shoot a gun, fly an airplane or even drive a car. “Not everyone can become a doctor, not everyone needs an education” Always easy to decide for other people, right?
- sandworm101 2y ago
  But education doesnt do damage. Glasses to create 20/20 vision at distance, when a person spends so much time at sub-foot distances, damages the eye.
tengwar2 2y ago
My experience is that that has limited validity. I wear varifocals, but for the past few years have had some single focus lenses set a bit further out than reading lenses. The motivation is to be able to see the top of a large screen, which is difficult with varifocals as you have to cant your head back. These intermediate lenses are very comfortable around the house, and fine for walking around to the local shop. However they are not adequate for driving. I could probably pass the UK test for legality, but I do need sharp vision further off to anticipate signs and hazards. BTW - most reading is at sub-foot distance? I think not!
- sandworm101 2y ago
  Tablets and phones. And if you are a kid in a japanese school learning to draw characters, you are likely focused on a small piece of paper perhaps six inches from your face.
jerlam 2y ago
Presumably they can be adjusted to only provide the minimum amount of correction necessary for the user's eyes to achieve correct focus, thus having the eye muscles always relaxed. Only if the glasses detect something far away would it be adjusting itself to the "strongest" power. At intermediate ranges it would be using an intermediate power, and if the distance is something that you can read without correction it would become a (non-prescription) lens.

deleted 2y ago

[deleted]

stevebmark 2y ago

Hopefully you've already come across myopic defocus lenses and low dose atropine in your reading about myopia. Overfocus in peripheral vision is a known trigger of myopia progression.

wiseowise 2y ago

> We perhaps need to admit that not everyone needs to shoot a gun, fly an airplane or even drive a car. “Not everyone can become a doctor, not everyone needs an education” Always easy to decide for other people, right?

sandworm101 2y ago
But education doesnt do damage. Glasses to create 20/20 vision at distance, when a person spends so much time at sub-foot distances, damages the eye.

tengwar2 2y ago

My experience is that that has limited validity. I wear varifocals, but for the past few years have had some single focus lenses set a bit further out than reading lenses. The motivation is to be able to see the top of a large screen, which is difficult with varifocals as you have to cant your head back. These intermediate lenses are very comfortable around the house, and fine for walking around to the local shop. However they are not adequate for driving. I could probably pass the UK test for legality, but I do need sharp vision further off to anticipate signs and hazards. BTW - most reading is at sub-foot distance? I think not!

sandworm101 2y ago
Tablets and phones. And if you are a kid in a japanese school learning to draw characters, you are likely focused on a small piece of paper perhaps six inches from your face.

jerlam 2y ago

Presumably they can be adjusted to only provide the minimum amount of correction necessary for the user's eyes to achieve correct focus, thus having the eye muscles always relaxed. Only if the glasses detect something far away would it be adjusting itself to the "strongest" power. At intermediate ranges it would be using an intermediate power, and if the distance is something that you can read without correction it would become a (non-prescription) lens.