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 ...

Sugihara asks. “The existence of such geometry-defying objects warns us of the potential dangers of optical illusions in our lives.” An "ambiguous object" is one with different appearances on ...

Here we are with another challenge. This might seem an easier optical illusion, but many have failed to find the right answer within the given time period. The challenge is to identify 690 in this ...

Optical illusions are great fun ... This illusion was discovered by German psychologist Herman Ebbinghaus in the 19th century. This and similar geometrical illusions have been studied by psychologists ...

Op Art, also known as optical art, is a type of art that features optical illusions. The way that ... They are based on geometric designs such as parallel lines, spirals, waves, circles and ...