binocular, binoculars, field glasses, opera glasses - an optical instrument designed for simultaneous use by both eyes

esophagoscope, oesophagoscope - an optical instrument for examining the inside of the esophagus

instrument - a device that requires skill for proper use

jeweler's glass - an optical instrument used by jewelers; has one or more lenses and is used to view features not readily seen

lens, lens system, lense - a transparent optical device used to converge or diverge transmitted light and to form images

periscope - an optical instrument that provides a view of an otherwise obstructed field

projector - an optical instrument that projects an enlarged image onto a screen

sight - a optical instrument for aiding the eye in aiming, as on a firearm or surveying instrument

eyeglasses, glasses, specs, spectacles - optical instrument consisting of a pair of lenses for correcting defective vision

prism spectroscope, spectroscope - an optical instrument for spectrographic analysis