LIDAR sensors and tunable lenses could create autofocus glasses

Image caption: Visual demonstrator – The 3D model and final prototype of a custom frame used to assess the electronically tunable lenses. Image courtesy: Biomed. Opt. Express 10.1364/BOE.471190 © The Optical Society. Article by Cynthia E Keen. Physics World – December 14, 2022.

It’s long been a dream of people whose ageing eyes cannot focus clearly on close-up objects to have a pair of glasses that automatically adjust to provide optical clarity for whatever they are looking at. Presbyopia, the gradual deterioration of the lens’s ability to focus light correctly on the retina, is a natural condition of ageing. But because of this deterioration, many people aged 60 and above can no longer clearly see anything within a radius of a metre. An estimated two billion people live with this condition. […]

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