I first read about these glasses in National Geographic for eye docs who go to third world countries to fit the indigent for corrective lenses. Donated glasses are a problem because the lens/frames do not always work for the patient. These glasses have two lenses that a patient can inject a patented viscous oil to change the lens refraction until their vision is 'clear'. No eye chart needed. Once the vision is set, they can stopcock the oil and remove the syringes to reattach and adjust them later if their vision changes...awesome!!! And now we have them...
