Meta-lens offers superior off-axis focus

https://phys.org/news/2022-10-meta-lens-superior-off-axis-focus.html

"TiO2 nanopillars atop Distributed Bragg Reflector... sandwich of alternating layers SiO2 and TiO2... 300μm diameter... aperture 0.6 and focal length 200μm... nano-unit cells interface DBR... reshape reflected light wavefront... negligible intrinsic loss and easy fabricate... focus red light with wavelength 633nm, to high-quality point for incident beam with normal angle... focusing quality... does not degrade even when angle of incident beam reaches 30 degrees... optical tweezers to imaging"

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Wavefront shaping: From telescopes to biological tissue

https://phys.org/news/2023-02-wavefront-telescopes-biological-tissue.html

Spiral-shaped lens provides clear vision at a range of distances and lighting conditions

https://phys.org/news/2024-02-spiral-lens-vision-range-distances.html