metal spectacle frame

spectacle frame, metal 

A structure in metal for enclosing or supporting ophthalmic lenses. Common materials include nickel/silver, Hi-nickel alloy, bronze, stainless steel, gold, gold plated, gold coating (commonly referred to as gold filled in which the base metal is most often nickel silver and for better quality frames, monel), copper, beryllium, titanium and sometimes aluminium. Metal spectacle frames are usually more rigid and maintain their shape better than plastic spectacle frames. However, the contacts with the skin of the nose and ears are done with plastic (or silicone) nose pads and temple covers.
References in periodicals archive ?
Manufacturers have to test samples of all metal spectacle frames for nickel release; the process is described in BS EN ISO 12870 Spectacle frames - requirements and test methods, which, in turn, refers to two standards that describe tests originally developed by the jewellery industry.
n When using electrical appliances such as phones or computers, metal spectacle frames can act as antennae, focusing electro-magnetic fields around the eyes hastening the onset of vision problems;
3) Plated metal spectacle frames can be coated with a clear lacquer to provide protection from the nickel content, however, the duration of protection depends upon the patient's skin.