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.
The damage comes from strain, which can be caused by trying to see through the wrong prescription of lenses (or no lenses).
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.