Most people who wear eyeglasses probably aren't too familiar with the different parts of the frames that they wear everyday. You may have heard some of the parts of your glasses mentioned while you were being fitted, or in a brochure or other literature. It isn't essential that the glasses wearer know all the parts of their eyeglasses, but it will give you a better understanding of the fitting process and why an optician makes some of the suggestions that they do.
Contemporary glasses are available in a wide range of styles, sizes and materials, but the basic parts of the frames are generally the same. Both cheap eyeglasses and expensive glasses share many of the same physical qualities, and learning about them will help anyone to have a better understanding of the fitting process.
The frame front is the part of your glasses that holds the lenses in place and forms a bridge across the top of your nose. The lenses are inserted into the eye wires or rims, which are also a part of the frame front. The bridge is the part of your eyeglasses that extends over your nose and supports most of the weight of the glasses. The bridge holds up to 90 percent of the weight of the eyeglasses as they sit on your face. The bridge part of the glasses comes in a few different designs, including a keyhole bridge, adjustable bridge, saddle bridge and a double bridge. Each type basically describes either the shape or the function of the bridge.
Moving away from the nose, the end pieces are where the temples are attached and are extensions of the frame front. The temples are the parts that go over and behind your ears to hold the glasses in place on your face. The hinges allow the temples to swing and connect them to the frame front. Some different types of temples for eyeglasses include skull temples, riding bow temples, comfort cable temples, spring-hinged temples and library or paddle temples. Each of these has a slightly different shape that helps in the design of a certain pair of glasses or in the comfort of the wearer.
Nose pads are plastic pieces of the glasses that attach to the frame or pad arms and help to keep the glasses in their proper position. The pad arms work to keep the nose pads held in place and allow for adjustments to the eyeglasses to help conform to the bridge of the wearer. In some types of metal frames, a top bar crosses the top of the glasses for reinforcement. Top bars are more common in aviator-style eyeglasses. Temple tips are little plastic coatings that are placed on the ends of the temples behind the ears. With rimless frames, the bridge and temples of the glasses are mounted directly on the lenses with no rims or eyewires to hold them in place. Next time you take off your glasses, look over all the different parts so you have a better understanding of exactly how they work.
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