- trifocal spectacles
- трифокальные очки
Англо-русский медицинский словарь. 2012.
trifocal spectacles
Смотреть что такое "trifocal spectacles" в других словарях:
trifocal — adj. & n. adj. having three focuses, esp. of a lens with different focal lengths. n. (in pl.) trifocal spectacles … Useful english dictionary
Corrective lens — A bifocal corrective eyeglass lens A pair of contact le … Wikipedia
Optician — An optician uses a lensometer to check eye glasses. An optician is a person who is trained to fill prescriptions for eye correction in the field of medicine … Wikipedia
Glasses — Glasses, also called eyeglasses or spectacles, are frames bearing lenses worn in front of the eyes, normally for vision correction, eye protection, or for protection from UV rays.Modern glasses are typically supported by pads on the bridge of the … Wikipedia
Bifocals — are eyeglasses whose corrective lenses each contain regions with two distinct optical powers. Bifocals are most commonly prescribed to people with presbyopia who also require a correction for myopia, hypermetropia, and/or astigmatism.… … Wikipedia
Lens — The transparent structure inside the eye that focuses light rays onto the retina (the nerve layer that lines the back of the eye, senses light and creates impulses that go through the optic nerve to the brain). The lens was named after the lentil … Medical dictionary
Progressive lens — View through a progressive lens at some distance. In normal use, a much smaller section of the glass is used, so that the distortion is much smaller. Progressive spectacle lenses, also called progressive addition lenses (PAL), progressive power … Wikipedia
optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… … Universalium
eye disease — Introduction any of the diseases or disorders that affect the human eye (eye, human). This article briefly describes the more common diseases of the eye and its associated structures, the methods used in examination and diagnosis, and the… … Universalium
trifocals — noun Spectacles with corrective lenses that have three different powers per eye. See Also: bifocals, trifocal … Wiktionary
bifocal lens — a lens with two principal focal lengths: the upper part of the lens gives a sharp image of distant objects and the lower part gives a sharp image of near objects, as when reading. Examples are bifocal spectacles, bifocal contact lenses, and… … Medical dictionary
