In visual perception, an optical illusion (also called a visual illusion) is an illusion caused by the visual system and characterized by a visual percept that arguably appears to differ from reality.
I have always been fascinated by optical illusions ever since I was a child, when I first saw the optical illusion called, cruelly, “My wife and my mother-in-law”, www.thesun.ie/tech/8917436/spot-all-women-optical-illusio... which depicts a young lady turning away from the viewer (my wife) and an old crone with a hooked nose and chin with a grimace buried into her fur tippet (my mother-in-law). It first appeared on a German postcard in 1888.
I tried my own trick of the eye optical illusion using a late Nineteenth century chromolithograph of an eye with an Art Nouveau hand mirror, placed carefully to make the reflection appear as though it is a continuation of a depiction of the eye. I do hope you like it