Eyeliner is a cosmetic used to define the eyes. It is applied around the contours of the eye to create a variety of aesthetic illusions. Although primarily aimed at females, it has broadened its appeal to the male market, known commonly by the portmanteau guyliner. Eyeliner was first used in Ancient Egypt and Mesopotamia as a dark black line around the eyes. As early as 10,000 BC, Egyptians wore various cosmetics not only for aesthetics but to protect the skin from the desert sun. Research has also speculated that eyeliner was worn to protect the wearer from the evil eye. The characteristic of having heavily lined eyes has been frequently depicted in Egyptian art. They produced eyeliner with a variety of materials including lead, copper ore and antimony (see Kohl (cosmetics).
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