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Have you experienced confusion in trying to decipher the meanings of terms related to your reading glasses? For instance, can you differentiate the definition of a bridge versus a frame, bifocal versus multifocal or polycarbonate versus power? If you answered no, you are not alone. Reading glasses terminology can become confusing for the average wearer. However, as reading glasses are commonly a daily necessity, it is paramount to gain an understanding of terms related to reading glasses’ anatomy and functionality.

A basic yet significant consideration for the reading glasses buyer and/or wearer is lens type. Those in the market for reading glasses should be aware of the distinctions between a bifocal, trifocal and multifocal lens. A bifocal lens offers two different optical powers. Typically, one power is intended for viewing distant objects, while the other aids in viewing close objects. Alternatively, a trifocal lens features three levels of magnification to correct distance, intermediate and near vision. Incorporating both classifications, a multifocal lens offers segments which provide two or more powers.

Also important in the buying process is an understanding of reading glasses’ working parts. Bridge, frame, temples and lenses constitute standard reading glasses. The bridge is a rounded piece found in the center of the frame that sits on the glasses wearer’s nose. The frame consists of the circular or rectangular pieces at eyeglasses’ front into which lens are fitted. These are typically made of plastic or metal. Temples are identical long and narrow arms that attach to the ends of the frame with hinges and extend over the ears to keep eyeglasses in place. A lens is a glass, plastic or poly carbonate piece through which a wearer views. Reading glasses lenses range from 1.0 to 3.0 in magnification, or strength.

Further explore the definitions of reading glasses relevant words and phrases in the glossary of common eyeglass terminology.