Optical illusions push your brain to think creatively, and this one is a tough test. Spotting two patients hidden in an image within 9 seconds is the challenge presented. One patient is disguised in the doctor’s hair, and the other around the chest. These illusions sharpen your attention and improve cognitive skills, encouraging a different perspective. Optical illusions push your brain to think creatively, and this one is a tough test. Spotting two patients hidden in an image within 9 seconds is the challenge presented. One patient is disguised in the doctor’s hair, and the other around the chest. These illusions sharpen your attention and improve cognitive skills, encouraging a different perspective. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle