enow.com Web Search

  1. Ads

    related to: contacts with prism correction lenses

Search results

  1. Results from the WOW.Com Content Network
  2. EnChroma - Wikipedia

    en.wikipedia.org/wiki/EnChroma

    EnChroma lenses are designed, manufactured, marketed and distributed by EnChroma, inc. in Berkeley, California. EnChroma glasses were invented incidentally in 2002 by Donald McPherson while trying to develop lenses to protect and aid surgeons during laser operations. The company received a grant from the NIH in 2005 and the glasses were ...

  3. Petzval lens - Wikipedia

    en.wikipedia.org/wiki/Petzval_lens

    Petzval portrait lens. The Petzval objective, or Petzval lens, is the first photographic portrait objective lens (with a 160 mm focal length) in the history of photography. [1] It was developed by the Slovak mathematics professor Joseph Petzval in 1840 in Vienna, [2] with technical advice provided by Peter Wilhelm Friedrich von Voigtländer [ de].

  4. Category:Corrective lenses - Wikipedia

    en.wikipedia.org/wiki/Category:Corrective_lenses

    A corrective lens is a lens worn on or before the eye. ... Contact lenses‎ (27 P) G. Glasses‎ ... Prism correction; Prism dioptre; Progressive lens; R. Reading stone;

  5. Perger prism - Wikipedia

    en.wikipedia.org/wiki/Perger_prism

    Perger prism. A Perger prism or Perger–Porro prism system is a prism, that is used to invert (rotate by 180°) an image. The special feature of this prism is that, like a traditional double Porro prism system, it manages this with only four beam deflections and has neither a roof edge with the accompanying phase correction problems, a ...

  6. Uppendahl prism - Wikipedia

    en.wikipedia.org/wiki/Uppendahl_prism

    An Uppendahl prism [1] is an erecting prism, i.e. a special reflection prism that is used to invert an image (rotation by 180°). The erecting system consists of three partial prisms made of optical glass with a high refractive index cemented together to form a symmetric assembly and is [2] used in microscopy as well as in binoculars technology.

  7. Lensmeter - Wikipedia

    en.wikipedia.org/wiki/Lensmeter

    13 – Prism scale knob. A lensmeter or lensometer (sometimes even known as focimeter or vertometer), [1] [2] is an optical instrument used in ophthalmology. It is mainly used by optometrists and opticians to measure the back or front vertex power of a spectacle lens and verify the correct prescription in a pair of eyeglasses, to properly ...

  1. Ad

    related to: contacts with prism correction lenses