Endless Facts, One Snippet at a Time
What Causes Optical Illusions
- Illusions occur when the brain’s predictions outpace raw input.
- Visual shortcuts evolved for speed, not perfect accuracy.
- Light, shadow, and perspective tricks exploit these mental shortcuts.
- Motion illusions come from conflicting depth or color cues.
- The brain fills gaps using memory and expectation.
- After-images result when photoreceptors remain over-stimulated.
- Context changes meaning—a gray square looks lighter or darker by surroundings.
- Optical illusions prove perception is constructed, not recorded.
- Artists and designers use them to control visual flow and focus.
- Every illusion is the brain revealing how it guesses at truth.