Optical illusions are amazing visual puzzles that challenge how we see the world around us. These illusions confuse the eyes but also sharpen cognitive abilities and enhance intelligence. One of the most popular optical illusions going viral now is to find hidden sets of zeros in a picture full of the letter ‘O.’ The task is to find these zeros within a fixed time limit of just 9 seconds, testing your observation skills. Optical illusions are amazing visual puzzles that challenge how we see the world around us. These illusions confuse the eyes but also sharpen cognitive abilities and enhance intelligence. One of the most popular optical illusions going viral now is to find hidden sets of zeros in a picture full of the letter ‘O.’ The task is to find these zeros within a fixed time limit of just 9 seconds, testing your observation skills. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle