By moving the plastic across the top of a picture, you only see one in four lines at one time, which then creates the illusion of movement. Produced by Claudia Romeo More from UK This artist uses ...

Op Art, also known as optical art, is a type of art that features optical illusions ... is moving. Bridget Riley's Uneasy Centre features black and white circles painted with lines of varying ...

Optical illusion often leaves people confused and intrigued. The new trend on the internet asking people to “find the curved lines” is no different. Users on Twitter are sharing the posts in ...

One such fine illustration can be seen in an old optical illusion where a Cat is hidden behind horizontal lines. The above optical illusion is a visual test that will play tricks on you by hiding ...