The Flashed Face Distortion Effect is a phenomenon in which a person's face appears to be distorted when briefly exposed to a face flashed on a screen. This effect has been studied extensively in the field of psychology, as it has implications for how people process and recognize faces. The effect has
From Wikipedia
The flashed face distortion effect is a visual illusion in which ordinary human faces appear grotesque and distorted when images flash in the periphery. The viewer specifically focuses on the cross midway between the two faces.