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No. It is possible to have them tinted though. If you are going to do this, bear in mind that anti-reflective coated lenses will not tint as well as uncoated ones.
It would depend on the lens. Higher quality lenses are coated with a substance to help eliminate distortion and light polution. If you look at the lenses glass and you see a multi-coloured reflection on the glass, then it is probably coated. Alcohol should not be used on these lenses. It would be better to use a camera lens specific cleaning cloth to clean them.
It contains magnifying lenses and glass-coated fibers that send concentrated light into the joint and a camera
The raw material of lenses is plastic polymer in most cases. There are some lenses which are made from glass materials as well.
Plastic, glass, polycarbonate.
PureVision contact lenses are designed to give one healthy eyes, outstanding comfort and visual quality. The materials they use to make contact lenses are not known. However, they use patented Aergel material.
electrician tools must be insulated so that they dont get electrocuted
human body is good conductor of electricity.For our safety electric tool are coated with insulating materials.
They're made from specially formulated glass. Formed into a large, thick 'sheet' during manufacture, the lenses are cut from the sheet by diamond-coated cutters. The surface of the lens is then refined by a lathe.
Your question is not perfectly clear, but ... . Glass is commonly coated to improve its scratch resistance, or to help eliminate reflections from the glass surface itself. Spectacle lenses are commonly coated to improve their scratch resistance. Camera lenses are coated to help minimise reflections internal to the lens system. In a building, the window glass may be given a mirror coating (often nickel) or other colour for aesthetic purposes. The glass in my car has been coated to reduce UV transmission, and thus reduce degradation of the interior.
Plating is used for conductive materials while coating is used for non-conductive materials. My brass horn is silver plated while patio table is plastic coated.
Copper Or Zinc Coated Pipe