anastigmat - compound lens or lens system designed to be free of astigmatism and able to form approximately point images

anastigmatic lens - a lens designed to correct astigmatism

camera lens, optical lens - a lens that focuses the image in a camera

compound lens - a lens system consisting of two or more lenses on the same axis

optical condenser, condenser - lens used to concentrate light on an object

contact lens, contact - a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication

converging lens, convex lens - lens such that a beam of light passing through it is brought to a point or focus

crown lens - a lens made of optical crown glass

concave lens, diverging lens - a lens such that a parallel beam of light passing through it is caused to diverge or spread out

eyepiece, ocular - combination of lenses at the viewing end of optical instruments

field lens - the lens that is farthest from the eye in an optical device with morethan one lens

Fresnel lens - lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length

intraocular lens - an artificial lens that is implanted into the eye of someone to replace a damaged natural lens or someone who has had a cataract removed

eyeglass, monocle - lens for correcting defective vision in one eye; held in place by facial muscles

object glass, objective - the lens or system of lenses nearest the object being viewed

optical device - a device for producing or controlling light

optical instrument - an instrument designed to aid vision

rosid dicot genus - a genus of dicotyledonous plants

Papilionoideae, subfamily Papilionoideae - alternative name used in some classification systems for the family Papilionaceae

communication channel, channel, line - (often plural) a means of communication or access; "it must go through official channels"; "lines of communication were set up between the two firms"

figure of speech, trope, image, figure - language used in a figurative or nonliteral sense

organ - a fully differentiated structural and functional unit in an animal that is specialized for some particular function

eye, oculus, optic - the organ of sight

lens capsule - a tenuous mesoblastic membrane surrounding the lens

electronic equipment - equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor)