Scientists at the Hebrew University of Jerusalem have developed low-cost, lightweight flat lenses – around a thousandth of the thickness of a human hair. They will revolutionize products, such as consumer electronics, cellphones, VR headsets, and drones that need to be as light as possible.
https://www.afhu.org/2022/03/28/super-thin-lenses-coming-to-cell-phones-glasses-and-more/
https://www.nanowerk.com/nanotechnology-news2/newsid=60296.php