What "circle" is perceived as the most "round"?
Our eyes are a rather strange organ, which, often, deceives us. But if you know the features of human visual perception, then you can create a more understandable and clean design. Typographers are not the only ones who use optical tricks in creating readable and harmonious looking fonts. This knowledge is also useful to interface designers who organize communication between the user and the machine.
How to create visually proportional icons, correctly arrange objects of different shapes and perform an ideal rounding of corners. In the post there are more than 50 images.