Optical illusions are an excellent method to test your observation skills and confuse your mind. These brain teasers deceive our eye, and on a first glance, it is not possible to find things that are kept in full view. Fast solving of optical illusions can be an indication of intense concentration, good attention to detail, and even better cognitive ability. Optical illusions are an excellent method to test your observation skills and confuse your mind. These brain teasers deceive our eye, and on a first glance, it is not possible to find things that are kept in full view. Fast solving of optical illusions can be an indication of intense concentration, good attention to detail, and even better cognitive ability. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle