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Sep 21, 1505
Leonardo da Vinci
leonardo da vinci illustrated the concept of contact lenses. -
first contact lenses
the first contact lenses were made from glass. they were fitted to fit the entire eye. -
Plastic contact lenses
designed to cover only the eye's cornea. made from plastics called hydrogels. they absorbed water to keep the lenses soft. -
Silicone-hydrogel contact lenses
silicone lenses were first marketed in 2002. they allowed more oxygen to pass through the lens. -
Custom-manufactured silicone-hydrogel lenses become available
hydrogel lenses became available in all prescriptions and sizes. which reduced the amount of complications. -
todays contact lenses
todays lenses can correct conditions such as keratoconus and aniseikonia. whoch effect sight. always they can change the appearence of your eyes. -