>"How It Works It works through a new technology called Dual Lens. This lens system consists of two thin, wave-shaped "plates" that slide over each other (ht

>"How It Works It works through a new technology called Dual Lens. This lens system consists of two thin, wave-shaped "plates" that slide over each other (http://selfadjustingglasses.com/reviews/flexvision/en/int1j2v3/img/how.jpg http://selfadjustingglasses.com/reviews/flexvision/en/int1j2...) with a twist of the button on the side of the frame. It enables you to self-adjust the power of the lens for each eye. Turn the dials to change the lens power at any time from -6 diopters of nearsightedness to +3 of farsightedness. This way you can address the problem of outdated and inaccurate spectacles." PDS: Think of this as a tuner -- for optical distance... A tuner in the above context -- is something that focuses something else in a certain way at a certain point -- in the above case, it's light rays -- but in theory (if made of the appropriate materials!) -- it could be any wavelength of the electromagnetic spectrum... (Optical Distance / The Focusing Of Optical Waves Of Light -- for lack of better terminology -- is an "Inverse Square Law" AKA "Law Of The Squares" phenomena (or at least highly related!): https://en.wikipedia.org/wiki/Inverse-square_law https://en.wikipedia.org/wiki/Inverse-square_law) It would be interesting to play with the above lens design -- but using different non-glass materials -- and experimenting with non-optical waves / wavelengths... What would happen? Anyway -- a highly interesting eyeglass design!