Optical illusions can be interesting and fun, whereas they can also be a helpful way to understand some of how the brain and visual system work together. Let’s solve this activity together and prove you have an HD vision power. Optical illusions can be interesting and fun, whereas they can also be a helpful way to understand some of how the brain and visual system work together. Let’s solve this activity together and prove you have an HD vision power. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle