This adorable cat is confused by that classic rotating snake optical illusion. So it seems cats have similar optical processing in the brain that we do. At least if this video is anything to go by.
Here is the ‘static’ illusion
This work was created by Akiyoshi Kitaoka in 2003 as an illusion design of the optimized Fraser-Wilcox illusion.
Credit: Akiyoshi Kitaoka via RIKEN BSI Neuroinformatics Japan Center, Creative Commons license
The main explanation is that fast, microscopic eye movements called "saccades,” cause the brain to detect ‘movement’ in the image.