An Instagram optical illusion challenge asks users to find an odd emoji among similar hand emojis. The puzzle, shared by opticalillusionss, challenges both novices and experts. The image contains one hand with fingers apart, unlike others with fingers close together. The illusion exploits the brain’s visual processing, making it a tricky yet engaging task. An Instagram optical illusion challenge asks users to find an odd emoji among similar hand emojis. The puzzle, shared by opticalillusionss, challenges both novices and experts. The image contains one hand with fingers apart, unlike others with fingers close together. The illusion exploits the brain’s visual processing, making it a tricky yet engaging task. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle