How Optical Illusions Affect the Eyes and Brain

Your eyes aren’t just seeing things, they’re reacting. 🔍👁️

@AlexDainisPhD explains how two illusions engage both your brain and your body. One creates the sensation of expanding darkness, triggering pupil dilation just like when you enter a dark room. The Asahi illusion causes your pupils to constrict in response to perceived brightness, even though the center of the image isn’t actually brighter. These responses show just how deeply your brain can influence your vision even in the absence of real light.