The Hering illusion features two straight, vertical lines that appear to bend. This is a type of geometrical-optical illusion. German physiologist Ewald Hering first reported the illusion in 1861 ...

One popular optical illusion is doing rounds on the internet where a cute elephant is walking with a wooden log in his trunk. In this puzzle, there is a horse's face that is cleverly hiding.

Optical Illusion Challenge: Images that trick your brain and challenge your ability to perceive things are known as "optical illusions." Cognitive, physiological, and literal visual illusions are ...