Focusing Eyeglasses

In 1987 Japanese camera maker Canon introduced its electro-optical system for autofocusing. Sensors perceived where the eye was looking and changed the images depth of field accordingly. Now, an Israeli company, Deep Optics (Petah-Tikva, east of Tel Aviv) has designed something similar for eyeglasses. When left on a side table, the glasses focus with maximum depth of field, but when a wearer puts them on, an electrical current changes the refractive index of a liquid crystal layer of the lenses, and the vision adjusts for presbyopia. MORE

Image Credit: Deep Optics