Colloquially, we refer to the fine wrinkles on the sides and below the eyes as crow’s feet. The name comes from the fact that the lines spread radially from the eye. Quasi like a crow’s foot. That is, crow’s feet are nothing more than eye wrinkles or smile lines. The underlying orbicularis oculi muscle is responsible for its formation. It surrounds the entire eye in a circle from the nose, through the eyebrows and corners of the eyes, to the cheekbone. When we squint the eye, its muscle fibers contract and crow’s feet form.
If you laugh a lot, you will get crow’s feet – sooner or later. That much is certain. But does this mean, conversely, that crow’s feet automatically always get happy people? No. Because the frequent squinting of the eyes also promotes the development. If you can’t read a text well or you wear glasses and you’re not wearing glasses right now – what happens? You inevitably squint your eyes and crow’s feet and wrinkles appear between your eyebrows (frown lines).