So I know legally blind is when the best *corrected* vision is 20/200. But my question is, why? Why can't we thicken the glasses lens or whatever to correct their vision like less visually impaired people? Why does it stop after your vision is so bad that no glasses or contacts will make it better?
Is it a lack of technology, or is there a medical/scientific reason for it (that having too thick a frame is impractical or?)
Thank you
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