the lenses were bifocal

См. также в других словарях:

• 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

• eyeglasses — Lenses set in frames to wear in front of the eyes to aid vision or correct vision defects (see ophthalmology, optometry). Their use for farsightedness and nearsightedness has been known since the late Middle Ages. In 1784 Benjamin Franklin… …   Universalium

• Corrective lens — A bifocal corrective eyeglass lens A pair of contact le …   Wikipedia

• Contact lens — Contacts redirects here. For the software application, see Address book. A pair of contact lenses, positioned with the concave side facing upward …   Wikipedia

• Myopia — For other uses, see Myopia (disambiguation). Myopia Classification and external resources ICD 10 H …   Wikipedia

• 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

• LASIK — or Lasik ( laser assisted in situ keratomileusis ) is a type of refractive laser eye surgery performed by ophthalmologists for correcting myopia, hyperopia, and astigmatism. [ [http://www.intelihealth.com/IH/ihtIH/WSS/9339/32123.html LASIK. ]… …   Wikipedia

• Eyeglass prescription — Using a phoropter to determine a prescription for eyeglasses An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist or ophthalmologist, that specifies the value of all parameters the prescriber has deemed… …   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

• 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