Illusions are Fascinating

Look at this picture above. They are all coffee beans, aren’t they? But there’s only one difference. Open your eyes and look more carefully. There’s a man’s face hidden among the beans. Yes, there’s definitely a face here. This is an illusion.
Illusions are fascinating! They also teach us about our visual perception and its limitations. There are several types of illusions like hidden objects, motion and time illusions, colour illusions, geometric illusions, space illusions and so on. They all challenge our brain and eyes.