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  2. Double Vision (Foreigner song) - Wikipedia

    en.wikipedia.org/wiki/Double_Vision_(Foreigner_song)

    "Double Vision" is a single by Foreigner from their second album of the same name. The song reached No. 2 on the Billboard Hot 100 chart for two weeks in 1978, behind "MacArthur Park" by Donna Summer. It became a gold record. The song was also a top 10 hit in Canada. The song has been a staple of the band's setlist since its release.

  3. Amici prism - Wikipedia

    en.wikipedia.org/wiki/Amici_prism

    Amici prism. An Amici prism, named for the astronomer Giovanni Battista Amici, is a type of compound dispersive prism used in spectrometers. The Amici prism consists of two triangular prisms in contact, with the first typically being made from a medium-dispersion crown glass, and the second from a higher-dispersion flint glass.

  4. Phoropter - Wikipedia

    en.wikipedia.org/wiki/Phoropter

    Phoroptor is a registered trademark currently owned by Reichert Technologies, filed Apr 25, 1921, by DeZeng Standard of New Jersey, with the USPTO, serial number 71146698. The word was coined at that time for the newest version of their phoro-optometer. DeZeng was purchased in 1925 by American Optical of Massachusetts, which continued to market ...

  5. Double Vision (1971 video) - Wikipedia

    en.wikipedia.org/wiki/Double_Vision_(1971_video)

    Double Vision is one of the earliest and best known video works by American (born 1937) artist Peter Campus. [1] Running 14 minutes and 22 seconds, it is a single channel video created with two video cameras fed through a mixer, providing the effect of a photographic double exposure. The video is divided into seven parts, [2] each referencing a ...

  6. Glasses - Wikipedia

    en.wikipedia.org/wiki/Glasses

    Glasses, also known as eyeglasses and spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears. Glasses are typically used for vision correction, such as with ...

  7. Laser blended vision - Wikipedia

    en.wikipedia.org/wiki/Laser_blended_vision

    Laser blended vision is a laser eye treatment which is used to treat presbyopia (ageing eyes; [1] progressive loss of the ability to focus on nearby objects) or other age-related eye conditions. [1] It can be used to help people that simply need reading glasses, and also those who have started to need bifocal or varifocal spectacle correction ...