In ancient Egypt, eye make up were worn by all castes. It is now believe that the cosmetics may have 
had as much to do with health as with beauty or style. Egyptologists and chemists came to that 
conclusion after analysing the contents of the Louvre's collection of 4,000-year-old pots once used 
in Egyptian makeup kits. They found chemical compounds such as malachite that were used thousands 
of years later by the Greeks and Romans to treat infectious eye diseases such as conjunctivitis and 
trachoma.