The advantage of plastic is that it is lightweight and more impact resistant than glass. The advantage of glass is that it is scratch resistant and provides the clearest possible vision.
The may be made of glass or plastic, but in either case they ARE always actual lenses.
Plastic, glass, polycarbonate.
Lenses are typically made of glass or transparent plastic
The raw material of lenses is plastic polymer in most cases. There are some lenses which are made from glass materials as well.
contact lenses!
Not all... Some spectacle-makers use plastic lenses instead of glass.
They were first made of glass, but now they are made of plastic.
Typically glass or plastic. If you are interested in learning specifically about contact lenses, you should visit Guru4Eyes.com (www.Guru4Eyes.com/contactlenses.html)
The lenses are made from either glass or plastic. The frames are generally made from plastic, nylon, a metal or metal alloy.
The lenses are made from either glass or plastic. The frames are generally made from plastic, nylon, a metal or metal alloy.
Optical microscopes use refractive lenses, typically of glass and occasionally of plastic, to focus light into the eye or another light detector. hope it helps... kinda
galileo used glass with a layer of plastic.