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*An optical illusion is a vast su-bject that wit-hholds
Rese#archers have been studying the effects of optical#
*Nat-ural optical ill-usions are fasci-nating beca-use
This is an emotional story how the cat comforts the dog.
The above image is an optical illusion that will play
*There are a var-iety of Optical illusions, from Cog-nitive