Typically glass or plastic. If you are interested in learning specifically about contact lenses, you should visit Guru4Eyes.com (www.Guru4Eyes.com/contactlenses.html)
Glass; that is all they had.
You put your finger in your eye and gently slide off the lenses
Hard contact lenses are made of a plastic polymer called polymethyl methacrylate.
Aurolab lenses are made of high-quality acrylic material. These IOLs are used in cataract surgeries.
The raw material of lenses is plastic polymer in most cases. There are some lenses which are made from glass materials as well.
The may be made of glass or plastic, but in either case they ARE always actual lenses.
Gas-permeable contact lenses are rigid lenses made of durable plastics that allow oxygen to pass through the lens .These lenses also are called GP lenses.
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These are the types of contact lenses and the material(s) they're made out of: 1. rigid lenses - polymethyl methacrylate (now improved) 2. soft lenses - silicon hydrogel (which is the material that is being used in manufacture of contact lenses today) 3. hybrid - mixture of materials of both rigid and soft lenses
in 1844..
glasses
According to Wikipedia, today's lenses are typically made from plastic, such as polycarbonate. Plastic is used in order to lessen the chance of breakage.