Perception of Einstein's mask

The optical illusion known as the 'Einstein mask' has quickly gained popularity on social media. It features an image in which the central part appears to rotate around its own axis, creating a vivid sense of motion. Users often quote obvious 'turns' and ask: does the mask look convex, like a mountain peak, or concave, like a cavity?

Psychological studies show that perception changes depending on viewing angle, lighting, and the viewer's personal attitude toward the image. Some people perceive the mask as convex, while others see it as concave. There is currently no scientific evidence confirming a single interpretation, and both versions are widespread.

Opinions continue to be shared on social networks, and the illusion's popularity remains high. However, experts note that such an optical 'trick' illustrates how easily the visual system can be deceived by simple realistic shapes.

Context

Optical illusions demonstrate how the visual system can distort perception.