There are various synonyms for the phrase "pair of glasses". Some of these synonyms include eyeglasses, spectacles, specs, prescription glasses, reading glasses, bifocals, trifocals, and corrective lenses. Eyeglasses or spectacles are a commonly used term to describe a pair of lenses that are set in a frame and worn to correct vision impairments. Prescription glasses are glasses that are customized to an individual's unique vision needs, while reading glasses are used for magnifying text or objects when reading. Bifocals and trifocals are glasses that have different lenses to correct for multiple vision conditions. Corrective lenses is an umbrella term that includes all types of glasses worn to improve vision.