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  2. Prism correction - Wikipedia

    en.wikipedia.org/wiki/Prism_correction

    Prentice's rule is a formula to calculate the amount of prism correction in a lens based on decentration and lens power. It can be used for prescribing, tolerance control, or determining unprescribed prism in eyeglasses.

  3. Prism cover test - Wikipedia

    en.wikipedia.org/wiki/Prism_Cover_Test

    The prism cover test (PCT) is an objective method to measure ocular misalignment or strabismus. It involves using prism bars, occluder and targets to neutralise the deviation and record the angle and base of the prism.

  4. Adjustable-focus eyeglasses - Wikipedia

    en.wikipedia.org/wiki/Adjustable-focus_eyeglasses

    "The correction and management of ametropia in older patients" David B Elliott PhD, MCOptom, FAAO Investigative Ophthalmology and Visual Science. 2004;45:2122–2128.) Stepping Up to a New Level: Effects of Blurring Vision in the Elderly Heasley K, Buckley J G, Elliott D B "Monovision: a review" Evans BJ Ophthalmic Physiol Opt. 2007 Sep;27(5 ...

  5. Corrective lens - Wikipedia

    en.wikipedia.org/wiki/Corrective_lens

    A corrective lens is a device that improves visual perception by correcting refractive errors. Learn about the different types of corrective lenses, such as glasses, contact lenses, intraocular lenses, and their prescriptions, uses, and advantages.

  6. Color blind glasses - Wikipedia

    en.wikipedia.org/wiki/Color_blind_glasses

    Learn about different kinds of color correcting lenses that claim to alleviate color blindness, such as disparate, monocular, binocular, tinted and notch filters. Find out why most lenses are not recommended or approved by experts and may have negative side effects.

  7. Prentice position - Wikipedia

    en.wikipedia.org/wiki/Prentice_position

    The Prentice position. The Prentice position is an orientation of a prism, used in optics, optometry and ophthalmology. [1] In this position, named after the optician Charles F. Prentice, the prism is oriented such that light enters it at an angle of 90° to the first surface, so that the beam does not refract at that surface.

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