“Over a billion folks have presbyopia, and we’ve created a pair of autofocal lenses that might in the future correct their vision way more effectively than conventional glasses,” mentioned Stanford electrical engineer Gordon Wetzstein. At present, the prototype resembles virtual reality goggles however the group hopes to modernize later versions.
Wetzstein’s prototype glasses – labeled autofocals – are supposed to solve the primary issue with existing progressive lenses: These traditional glasses need the wearer to align their head to focus precisely. Visualize driving a car and searching in a facet mirror to change lanes. With progressive lenses, there is restricted or no peripheral focus. The driver has to change from looking on the road forward through the top of the glasses, then turn nearly 90° to see the quick mirror via the lower portion of the lens.
This visual measure can even make it difficult to navigate the world. “People carrying progressive lenses have more danger of falling and injuring themselves,” mentioned graduate student Robert Konrad, a co-writer on a paper explaining the autofocal glasses revealed in the June 28thissue of the journal Science Advances.
The Stanford prototype functions quite like the lens of the eye, with fluid-crammed lenses that bulge and thin as the visual field varies. It also comprises eye-monitoring sensors that triangulate where an individual is wanting and establish the exact distance to the object in sight. The researchers didn’t invent these lenses or eye-trackers; however, they did create the software program system that harnesses this eye-monitoring information to maintain the fluid-filled lenses in fixed and seamless focus.
Nitish Padmanaban, a graduate student and the first author of the paper, mentioned other groups had earlier tried to apply autofocus lenses to presbyopia.