This optical illusion test is specifically meant to measure your visual perception and attention to detail. You need to identify the word “DAD” amidst several words “BAD” and you only have 6 seconds for that! This optical illusion test is specifically meant to measure your visual perception and attention to detail. You need to identify the word “DAD” amidst several words “BAD” and you only have 6 seconds for that! Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle