171–180 of 330 posts
Ask yourself, how much brighter is it outside than inside (assuming a sunny day vs a brightly lit office)? Before looking into this, I would have guessed 2X or 3X, but would you believe it's actually over 100X! I bet most people's guess would also be off by 1 or 2 orders of magnitude. Even outdoors in the shade, it is over 50X brighter than indoors. (For specific numbers and comparisons, see: https://www.ncbi.nlm.nih…
Earlier quoted context omitted.
I didn't say that it was myopia did I? I specifically gave the glasses strength with the sign to indicate the kind of correction my eyes needed, and yes, it is far-sightedness, what else could it be with that particular prescription? Hence my need to wear them when working in the shop, I'm chance less without them doing any closer or detailed work. The point was: once you start wearing glasses it accelerates the slid…
Do you use these for reading books/screens or also for distance vision? If only for reading, then what you are describing sounds like presbyopia, which is different from far-sightedness. Your accommodation changing as you age is a normal process and doesn't have anything to do with sliding myopia/hyperopia.
So there may very well be more than one effect at work here. I can't really see the instrument cluster in the car but I know it by heart so it's not a problem and speed I can do by ear and get it well within the margin of error for speeding tickets.
I should probably get re-tested and maybe try bi-focals, but with the amount of driving I do right now I don't need to bother, the car is used so little I have it on a trickle charger to prevent the battery from going dead.
Ask yourself, how much brighter is it outside than inside (assuming a sunny day vs a brightly lit office)? Before looking into this, I would have guessed 2X or 3X, but would you believe it's actually over 100X! I bet most people's guess would also be off by 1 or 2 orders of magnitude. Even outdoors in the shade, it is over 50X brighter than indoors. (For specific numbers and comparisons, see: https://www.ncbi.nlm.nih…
7 'shades' brighter and you're already hitting '100x'.
Ask yourself, how much brighter is it outside than inside (assuming a sunny day vs a brightly lit office)? Before looking into this, I would have guessed 2X or 3X, but would you believe it's actually over 100X! I bet most people's guess would also be off by 1 or 2 orders of magnitude. Even outdoors in the shade, it is over 50X brighter than indoors. (For specific numbers and comparisons, see: https://www.ncbi.nlm.nih…
So, it's not even an individual correlation but a population-frequency-correlation between populations in different physical environments, which is so even more likely than an individual correlation to represent an effect other than causation in either direction, such as any other environmental (or population-genetic-distribution) difference.
Earlier quoted context omitted.
Agreed. I surveyed the existing medical literature on the topic in about 2018 (or was it 2017?) and conclusion was that it is still a very active area of research with a lot of controversy. Anecdotally, I have a low-grade myopia which gets observably worse after a lot of near work or sitting the whole day in front of a computer. I can pretty consistently reverse through the use of print pushing and use of anti-correc…
Slightly off topic, but how do you go about surveying the literature on a particular topic, say myopia or acne.?
These kinds of articles will then list relevant results, citing other relevant papers so you can continue going deeper from there.
BTW: -2 shortsightness is the optimal. You can see your own hands and what you are doing and eating until the day you die. I happen to be those lucky few. On sunny days the iris is so small I can manage without glasses.
I'm short-sighted. I'm more worried about blurry traffic than blurry food.
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I've read this study a while ago, and I think it helped me correct my son's myopia. When my 5yo kid's eye check came back with "he'll need glasses next year", we started strict "hour+ outside play daily" policy. At his next checkup, he had normal vision. Dr was surprised.
I believe that's still under active research. If this is a factor, my money is more on "your eyes will be focusing more at infinity" rather then low light levels.
Earlier quoted context omitted.
I've read this study a while ago, and I think it helped me correct my son's myopia. When my 5yo kid's eye check came back with "he'll need glasses next year", we started strict "hour+ outside play daily" policy. At his next checkup, he had normal vision. Dr was surprised.
I believe that's still under active research. If this is a factor, my money is more on "your eyes will be focusing more at infinity" rather then low light levels.
Earlier quoted context omitted.
How do you get stores to use your old prescription? I’ve had no luck with that.
Some of the online stores especially the ones based in China don't actually check your prescription.
https://www.optometricsofchatsworth.com/blog/study-finds-saf...
>The study analyzed 200 pairs of glasses that had been ordered from 10 different websites. The lenses were analyzed based on a number of criteria, including measurement of sphere power, cylinder power and axis, add power (if specified), separation of distance of optical centers and center thickness. The AOA reports that in some cases, single vision lenses were delivered instead of the bifocals that had been ordered. In other cases, specific lens treatments were either added to an or were left off.
>>almost half of the eyeglasses tested in the study (the AOA reports the number at 44.8 percent) didn't have the correct prescription strength or presented problems with safety.
BTW: -2 shortsightness is the optimal. You can see your own hands and what you are doing and eating until the day you die. I happen to be those lucky few. On sunny days the iris is so small I can manage without glasses.
I'm short-sighted. I'm more worried about blurry traffic than blurry food.
I couldn't find a study with data, but there are anecdotal guides online (for picking reading glasses) which state that by 60 years old, it's estimated that a person would need about +2.25 diopters in correction. So someone who is around -2 diopters may expect to have roughly perfect vision as they get older.