Wundt illusion - Optical Illusions


Wundt illusion

The Wundt illusion is an optical illusion that was first described by the German psychologist Wilhelm Wundt in the 19th century. The two red horizontal lines are both straight, but they look as if they are bowed inwards. The distortion is induced by the crooked lines on the background, as in Orbison's illusion. Hering illusion produces a similar, but inverted effect.
Wundt illusion