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  2. Prism cover test - Wikipedia

    en.wikipedia.org/wiki/Prism_Cover_Test

    measuring strabismus. The prism cover test (PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]

  3. Dr. Hook & the Medicine Show - Wikipedia

    en.wikipedia.org/wiki/Dr._Hook_&_the_Medicine_Show

    Dr. Hook & the Medicine Show (shortened to Dr. Hook in 1975) is an American rock band formed in Union City, New Jersey.The band had commercial success in the 1970s with hit singles "Sylvia's Mother" (1972), "The Cover of 'Rolling Stone'" (1973), "Only Sixteen" (1976), "A Little Bit More" (1976), "Sharing the Night Together" (1978), "When You're in Love with a Beautiful Woman" (1979), and ...

  4. Optical glass - Wikipedia

    en.wikipedia.org/wiki/Optical_glass

    Optical glass refers to a quality of glass suitable for the manufacture of optical systems such as optical lenses, prisms or mirrors.Unlike window glass or crystal, whose formula is adapted to the desired aesthetic effect, optical glass contains additives designed to modify certain optical or mechanical properties of the glass: refractive index, dispersion, transmittance, thermal expansion and ...

  5. The Cover of "Rolling Stone" - Wikipedia

    en.wikipedia.org/wiki/The_Cover_of_"Rolling_Stone"

    From left to right: Dennis Locorriere, Billy Francis, and Ray Sawyer of Dr. Hook & the Medicine Show on the March 29, 1973 cover of Rolling Stone in caricature. [3]The song satirizes success in the music business; the narrator laments that his band, despite having the superficial attributes of successful rock stars (including drug use, "teenage groupies, who'll do anything we say," and a ...

  6. Ray Sawyer - Wikipedia

    en.wikipedia.org/wiki/Ray_Sawyer

    Ray Sawyer (February 1, 1937 – December 31, 2018) [1] was an American percussionist and vocalist with the 1970s rock band Dr. Hook & the Medicine Show. [2] Though primarily a backing vocalist and occasional percussionist on congas or maracas, he sang lead on their hit song "The Cover of Rolling Stone" and was a recognizable presence in the band owing to the eyepatch and cowboy hat he wore.

  7. Dispersive prism - Wikipedia

    en.wikipedia.org/wiki/Dispersive_prism

    Dispersive prism. In optics, a dispersive prism is an optical prism that is used to disperse light, that is, to separate light into its spectral components (the colors of the rainbow). Different wavelengths (colors) of light will be deflected by the prism at different angles. [1] This is a result of the prism material's index of refraction ...

  8. Prism (optics) - Wikipedia

    en.wikipedia.org/wiki/Prism_(optics)

    Prism (optics) A familiar dispersive prism. An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base ...

  9. Binoculars - Wikipedia

    en.wikipedia.org/wiki/Binoculars

    Binoculars with roof prisms have been in use to a large extent since the second half of the 20th century. Roof prism designs result in objective lenses that are almost or totally in line with the eyepieces, creating an instrument that is narrower and more compact than Porro prisms and lighter. There is also a difference in image brightness.

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