crystal eyes - Robuta Search

https://www.sciencealert.com/ancient-trilobites-had-crystal-eyes-and-theyre-still-a-mystery

Nature has tried some pretty wild approaches to life's problems over the eons, and that's true for vision.

https://randomsexiness.net/galleries/metart/nimfa/crystal-eyes

https://makeagif.com/user/my_crystal_eyes

Albums of my_crystal_eyes's animated gifs on MakeAGif.

https://thecrystaleyes.com/category/technology/