Optical illusions are not just fascinating for the brain but also intriguing at a physiological level. A recent study unveils the ‘expanding hole’ illusion, which triggers pupil dilation as if entering darkness. Around 86% of individuals experience this illusion, with black holes inducing stronger pupil reactions than colored ones. This discovery implies that our pupils respond to perceived light, shedding light on the complexity of the visual system. Scientists are captivated by this dynamic illusion, with research highlighting the impact of the ‘expanding hole’ on pupil reflexes and perception. Understanding how our visual system interprets stimuli, even imaginary ones, is crucial in unraveling the mysteries of human perception.
