where does the crust in your eyes come from
Rheum Rheum (/ˈruːm/; from Greek: ῥεῦμα rheuma "a flowing, rheum"), also known as gound, is thin mucus naturally discharged from the eyes, nose, or mouth during sleep (cf. mucopurulent discharge).[1][2][3] Rheum dries and gathers as a crust in the corners of the eyes or the mouth, on the eyelids, or under the nose.[3] It is formed by a combination of mucus (in the case of the eyes, consisting of mucin discharged from the cornea or the conjunctiva), nasal mucus, blood cells, skin cells, or dust. Rheum from the eyes is particularly common. Dried rheum is commonly called sleep,[4] sleepy-seeds,[5] sleepy buds,[5] sleepy sand, eye goop, cheese, or sleepy dust.[6]
Beauty and cosmetics in ancient Egypt The two main forms of eye makeup were grepond eye paint and black kohl. The green eye paint was made of malachite, a copper carbonate pigment, and the black kohl was made from a substance called galena, a dark grey ore. Crushed up charcoal was also used in this process.