The eyebrow is an area of thick, delicate hairs kit eyebrow the eye that follows the shape of the lower margin of the brow ridges of some mammals. This section does not cite any sources. It is believed by anthropologists that the main function of the eyebrow is to prevent moisture, mostly salty sweat and rain, from flowing into the eye. Eyebrows have a facilitative function in communication, strengthening expressions, such as surprise or anger.
The eyebrows can cause a «false facial expression», when a person’s eyebrow shape appears to express an emotion that they are not experiencing. Joseph Jordania suggested that the primary evolutionary function of clearly visible eyebrows was safety from predators during the vulnerable nighttime sleep, when early hominid groups started sleeping on the ground, away from the trees. In the 1920s eyebrows were worn ultra thin, with a slightly pronounced curve, in order to emulate movie stars such as Clara Bow and Anna May Wong. Stars in the 1930s ditched the sloped look of the previous decade for a rounded upward bend. They also began to fill in their brows with a darker hue, emphasizing the bend.
Eyebrows are a major facial feature. Cosmetic methods have been developed to alter the look of one’s eyebrows, whether the goal is to add or remove hair, change the color, or change the position of the eyebrow. Several options exist for removing hair to achieve a thinner or smaller eyebrow, or to «correct» a unibrow, including manual and electronic tweezing, waxing, and threading. The most common method is to use tweezers to thin out and shape the eyebrow. To create a fuller look, eyebrows can be cloned in an eyebrow transplant: Individual strands of the eyebrow are mimicked to create a natural-looking eyebrow of the desired shape. The process of eyebrow transplant is quite similar to the process of hair transplant. In this process as well, follicles from an active area are transferred to the area where there are no hairs so that they can get new hairs.