correcting lenses
1hard contact lenses — small non permeable plastic lenses worn on the eye for correcting vision …
2eye 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… …
3Spherical aberration — shape of lenses and mirrors. This is an important effect, as spherical shapes are much easier to produce than aspherical and so most lenses have spherical shapes. Positive spherical aberration means peripheral rays are bent too much. Negative… …
4National Library Service for the Blind and Physically Handicapped — The National Library Service for the Blind and Physically Handicapped (NLS) is a free library program of braille and audio materials circulated to eligible borrowers in the United States by postage free mail. The program is a service sponsored by …
5Corrective lens — A bifocal corrective eyeglass lens A pair of contact le …
6Glasses — 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 …
7Contax — II A historic camera: the East Germany Contax S of 1949 – …
8History of the telescope — The earliest known working telescopes appeared in 1608 and are credited to Hans Lippershey and Zacharias Janssen, spectacle makers in Middelburg, and Jacob Metius of Alkmaar. The design of these early refracting telescopes consisted of a convex… …
9Cataract surgery — Intervention Cataract in Human Eye Magnified view seen on examination with a slit lamp ICD 9 CM …
10motion-picture technology — Introduction the means for the production and showing of motion pictures. It includes not only the motion picture camera and projector but also such technologies as those involved in recording sound, in editing both picture and sound, in… …
