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available, using plastic, metal, wire, and other materials for frames. Most glasses lenses are made of plastic, polyethylene, and glass.

Types

Glasses can be marked or found by their primary function, but also appear in combinations such as prescription sunglasses or safety glasses with enhanced magnification.

Corrective

Corrective lenses are used to correct refractive errors by bending the light entering the eye in order to alleviate the effects of conditions such

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