n
(countable, medicine) The adjustment of the eye to a change of the distance from an observed object.
n
(historical) A kind of hearing aid.
n
An interest in high fidelity sound reproduction and equipment.
n
An automated refractor used to prepare a prescription for glasses or contact lenses
n
A style of sunglasses with dark, often reflective lenses and very thin metal frames.
n
A specialized lens with a conical surface.
n
Spectacles that have corrective lenses of two different powers; used by people who need both distance and reading glasses.
n
(slang) Eyeglasses or spectacles.
n
(plural only, US, military slang) The brown-framed prescription eyeglasses issued to new recruits in the U.S. military, and perceived as notoriously unattractive.
n
A convex glass lens which is placed in front of a lamp to concentrate the light so as to make it more conspicuous as a signal; also the lantern itself.
n
(dated) A magnifying lens, as used to focus sunlight on to an object.
n
(informal) Non-prescription spectacles that magnify.
n
(informal) A contact lens.
n
A thin lens, made of flexible or rigid plastic, that is placed directly on to the eye to correct vision, used as an alternative to spectacles, or, if coloured, to change one's eye color cosmetically.
n
A lens worn in front of the eye to correct disorders of the vision such as myopia.
n
(obsolete, usually in the plural) a person's eye.
n
(UK) A type of contact lens that can be used for one day only and is thrown away at the end of the day when it is no longer needed.
n
Unused optical fibre that is available for use
n
(mechanics) A flexible membrane separating two chambers and fixed around its periphery that distends into one or other chamber as the difference in the pressure in the chambers varies.
n
(radiology) The degree to which the image of a scan stands out as a bright area.
n
(informal) An ergonomic factor or characteristic.
n
A sign or poster showing letters or symbols in progressively smaller lines of type, used to test distance vision.
n
lens; crystalline lens (part of the eye)
n
Alternative spelling of eyepiece [The lens (or combination of lenses) at the eye end of a microscope or telescope by which the image is viewed.]
n
Alternative spelling of eyeshade [(countable) A type of headgear for shielding the eyes from glaring light, usually consisting of a visor and a headband, more popular among indoor workers in the late-nineteenth and early-twentieth centuries than today.]
n
Alternative form of eye chart [A sign or poster showing letters or symbols in progressively smaller lines of type, used to test distance vision.]
n
A shield surrounding the eyepiece of a camera.
n
A dropper for administering eyedrops.
n
(US) Spectacles, glasses.
n
The hole to which the viewer places his or her eye in a device such as a telescope.
n
The lens (or combination of lenses) at the eye end of a microscope or telescope by which the image is viewed.
adj
(chiefly in combination) Having an eyepiece (of some specified kind).
n
The focal point of an optical lens.
n
Eye protection; protective eyewear.
n
A small, lenticular, calcareous body, especially an operculum of a small shell of the family Tubinidae, used to remove a foreign substance from the eye.
n
A device that tracks the movement of a subject's eyes when doing a specific task.
n
A vision aid or similar device worn over the eyes, such as eyeglasses, contact lenses, or protective goggles.
n
Alternative spelling of fibre optics [(British spelling) The transmission of light through fine flexible glass or plastic fibres, especially as a medium for communications networks.]
n
Alternative spelling of fibre optics [(British spelling) The transmission of light through fine flexible glass or plastic fibres, especially as a medium for communications networks.]
n
(British spelling) The transmission of light through fine flexible glass or plastic fibres, especially as a medium for communications networks.
n
Alternative spelling of fibre optics [(British spelling) The transmission of light through fine flexible glass or plastic fibres, especially as a medium for communications networks.]
n
Alternative spelling of fibre optics [(British spelling) The transmission of light through fine flexible glass or plastic fibres, especially as a medium for communications networks.]
n
A pair of binoculars for observing "in the field".
n
Alternative form of field glasses [binoculars.]
n
Synonym of flyaway spectacles
n
A type of surgical laser lens that has frosted edges in order to diffuse the radiation profile.
n
An part of a monocle, a projection off the ring holding the lens, which helps secure the monocle in the eye socket.
n
(historical) A looking-glass specifically designed to give an all round view when preparing one's toilette.
n
Field glasses; binoculars.
n
An instrument for recording the movements of the tongue during speech.
n
Protective eyewear set in a flexible frame to fit snugly against the face.
n
(informal) A pair of spectacles with round lenses in a light metal frame.
n
A novelty pair of horn-rimmed glasses with attached eyebrows, plastic nose, and bushy mustache, caricaturing Groucho Marx.
n
(plural only) A pair of spectacles (glasses) with round lenses.
n
(plural only) Synonym of Harry Potter glasses.
adj
(of an optical instrument) Capable of great magnification.
n
For any system of binocular vision, a three-dimensional curve containing all points from which the light will converge into a single image.
n
Any of a set of colored plates each containing a pattern of dots of various colors and sizes, forming a number or shape clearly visible to those with normal color vision; used in testing for color blindness.
n
(plural only) A pair of eyeglasses (spectacles) with round lenses.
n
(plural only) A pair of spectacles (glasses) with round lenses.
n
An object made or formed as a pair, such as a binocular opera glass.
n
A style of sunglasses which have frames containing horizontal slats as opposed to tinted lenses.
n
An object, usually made of glass, that focuses or defocuses the light that passes through it.
n
A rough, opaque piece of glass of suitable size, design and composition for use, when ground and polished, as a multifocal lens for use in a pair of eyeglasses.
n
(proscribed) Alternative spelling of lens [An object, usually made of glass, that focuses or defocuses the light that passes through it.]
n
Elaborate double eyeglasses.
n
Goggles intended to rectify strabismus by permitting vision only directly in front.
n
A particular kind of spectacles/glasses, consisting of two circles lenses connected by a half-circle bridge over the nose.
n
(optics) A lens which is convex on one side and concave on the other, being crescent-shaped in cross-section.
n
A single lens, usually in a wire frame, and used to correct vision for only one eye.
n
(retronym) A monocular telescope, as opposed to binoculars.
n
(informal) Spectacles with thick black circular frames.
n
Plastic eyeglasses with thick, horn-rimmed (typically black) frames, characteristically worn by nerds and members of the hipster subculture.
n
A spyglass or binoculars with large diameter lenses, used to see objects better in the dark.
n
Alternative spelling of night glass [A spyglass or binoculars with large diameter lenses, used to see objects better in the dark.]
n
An object that partially or completely impedes the amount of light reaching the eye.
n
(ichthyology) A type of occular radiance, which is the redirection of infalling light from above, reflecting it into the visual field to illuminate the field of vision, for diurnal active photolocation.
n
(Polari) A pair of spectacles; glasses; eyeglasses.
n
A pair of small low-powered binoculars for use at a theatrical performance.
n
One or more pairs of small low-powered binoculars for use by members of the audience at a theatrical performance.
n
(optics) A lens or other part of an optical instrument that interacts with light.
n
(American spelling) Alternative form of optical fibre [(British spelling) A thin, transparent, flexible fibre, made of glass or plastic, used for transmitting light.]
n
(British spelling) A thin, transparent, flexible fibre, made of glass or plastic, used for transmitting light.
n
A class of glass used to create optical lenses, such as that for spectacles or spyglasses
n
An instrument for transmission of auditory vibrations through the bones of the head, so as to be appreciated as sounds by persons deaf from causes other than those affecting the nervous apparatus of hearing.
n
A hand-held device consisting of a series of lenses and prisms, used to magnify objects so that they can be better seen from a distance, and looked at through both eyes.
n
A pair of lenses set in a frame worn on the nose and ears in order to correct deficiencies in eyesight or to ornament the face.
n
A pair of lenses set in a frame worn on the nose and ears in order to correct deficiencies in eyesight or to ornament the face.
n
Protective eyewear consisting of two lenses set in a flexible frame to fit snugly against the face.
n
(colloquial) A pair of lenses set in a frame worn on the nose and ears in order to correct deficiencies in eyesight or to ornament the face.
n
A pair of lenses set in a frame worn on the nose and ears in order to correct deficiencies in eyesight or to ornament the face.
n
A pair of glasses with tinted lenses designed to protect the eyes from sunlight.
n
(optics) A thin plastic membrane used as a beam splitter or protective cover.
n
(obsolete) An optical glass; a telescope.
n
temple-less eyeglasses that clip to the bridge of the nose
n
(dated, in the plural) Spectacles made with lenses of polaroid, once used to view certain 3-D movies.
n
Glasses made for a specific user; corrective spectacles.
n
(obsolete) Spectacles to protect the eyes from strong light, etc.
n
A field glass used at horseraces, usually as a pair (binoculars).
n
(in the plural) Reading glasses.
n
Any type of spectacles intended chiefly to deal with the effects of presbyopia by magnifying details such as fine text.
adj
Having a reticle in the focus of an eyepiece.
adj
Having a reticule or eyepiece.
n
Glasses (spectacles) designed to protect the eyes against flying objects such as dust, etc.
n
Alternative form of smartglasses [Glasses worn to provide software functions through augmented reality.]
n
Glasses worn to provide software functions through augmented reality.
n
A vision test using a Snellen chart.
n
Traditional eyewear used to prevent snow blindness, often formed of a piece of driftwood or bone into which one or two horizontal slits have been carved
n
(plural only, formal) A pair of lenses set in a frame worn on the nose and ears in order to correct deficiencies in eyesight or to ornament the face.
adj
Assisting sight, like a lens etc.
n
(uncommon, regional) A pair of binoculars.
n
(archaic) A convex lens of glass for producing heat by converging the sun's rays into a focus.
n
(colloquial) A person wearing sunglasses
n
Goggles to protect the eyes from material in the water, while swimming.
n
The part of a telescope containing the adjusting device for the eyepiece, etc.
n
(by extension) The diaphragm of a telephone.
n
(optics) Spectacles with corrective lenses that have three different powers per eye.
n
A notional set of binoculars for a three-eyed being.
n
spectacles having varifocal lenses
n
A glass frame used in printing vignette pictures.
n
The optical axis of an eye (extending from the viewed object through the centre of the pupil to the yellow spot of the retina)
n
A pair of wayfarer glasses.
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