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[–]magnora7 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (0 children)

Yes that makes sense. Similar to a fresnel lens, which is the first thing that came to my mind. https://partsolutions.com/wp-content/uploads/2014/09/fresnel-lens-1.jpg

But it's made to focus only on things far away, and then things close to it are perfectly blurry. It seems a distance-based thing