143 Optical Illusions app for iPhone and iPad


4.9 ( 5679 ratings )
Reference Entertainment
Developer: DMBC
0.99 USD
Current version: 1.2, last update: 7 years ago
First release : 17 Dec 2010
App size: 8.87 Mb

An optical illusion (also called a visual illusion) is characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a percept that does not tally with a physical measurement of the stimulus source. There are three main types: literal optical illusions that create images that are different from the objects that make them, physiological ones that are the effects on the eyes and brain of excessive stimulation of a specific type (brightness, tilt, color, movement), and cognitive illusions where the eye and brain make unconscious inferences. They can also be known as "mind games".