February 18, 2025
One of the most fascinating types of optical illusions are those that seem to be in motion, even though they’re actually static images. These are known as physiological optical illusions, which occur when the brain becomes overstimulated by an excess of color, light, movement, or depth, making it difficult to process what’s being seen.
Take this hypnotic illusion, for example—with its swirling purple and yellow vortex, it may look like a moving image, but it’s completely still. The intricate patterns, light, and contrasting elements trick your brain into perceiving motion as your eyes scan the design. But if you focus on the very center, you should notice the movement stops.