altphoto@lemmy.today 3 days ago
The ophthalmologists in the room have spoken.
I call it bullshit. No ophthalmologist has ever gone to jail because some dude with myopia ran over two cats and a cute puppy dog. Usually, whoever is driving gets into trouble.
But let’s think for a moment. If wearing glasses that are not your prescription actually affect your prescription in some way, then couldn’t we figure out a way to reverse near-and far-sidedness? Like if you’re near sighted and then use +10 (strong positive lenses, thicker in the center) maybe that makes your eye revert to better vision. And vise versa for far sighted people wearing -10 lenses for say 2 hours per day or something.
Instead of the bull, I would love to be able to find some glasses at the Walmart that I can use because I just lost my prescription or something. If there’s a lens center position problem that too could be adjustable.
In short there’s no reason. Its just how dumb things work.
morphballganon@lemmy.world 3 days ago
In response to your 2nd paragraph hypothetical, no, because the changes you’re describing are all forms of damage. You’d have to replace or repair the lens in the eye to revert the damage, and simply looking through a different type of external lens isn’t going to achieve that.
altphoto@lemmy.today 3 days ago
Exactly. So the damage doesn’t come from looking thru lenses. Thus not having minus lenses available is pure BS.
morphballganon@lemmy.world 3 days ago
The damage comes from strain, which can be caused by trying to see through the wrong prescription of lenses (or no lenses).
altphoto@lemmy.today 3 days ago
Yeah but you get the same strain with positive lenses as you do from negative ones. As an example, I don’t get a prescription to use my friends telescope or to use my optical microscope. I just adjust the magnification until I can see the stuff I want in focus. Lenses are just lame telescopes or microscopes positive or negative. If you could adjust them …by swapping lenses at Walmart for example, I could find a minus pair for reading and another for driving. For driving all you need is a simplified version of the air balloon toy they use to measure your prescription. It would simply present an image set ad driving distance. Then you just swap a few lenses until you get it right.
That would leave the really important problems for the ophthalmologist. Like cataracts or retinal detachment.