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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. 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.

  4. Bates method - Wikipedia

    en.wikipedia.org/wiki/Bates_method

    The Bates method is a discredited and potentially harmful approach to improve eyesight, based on the false belief that the extraocular muscles control focus and that "mental strain" causes defective vision. It was promoted by William Bates and Bernarr Macfadden in the early 20th century, and has been criticized by medical professionals and visual scientists.

  5. Pinhole glasses - Wikipedia

    en.wikipedia.org/wiki/Pinhole_glasses

    Pinhole glasses are eyeglasses with pinhole-sized perforations that reduce the size of the circle of confusion on the retina and increase depth of field. They are claimed to be useful for people with refractive error, but they also reduce brightness and peripheral vision, and are not recommended for driving or operating machinery.

  6. Astigmatism - Wikipedia

    en.wikipedia.org/wiki/Astigmatism

    Astigmatism is a refractive error that causes blurred or distorted vision due to an irregular curvature of the eye. Learn about the types, causes, diagnosis and ...

  7. Strabismus surgery - Wikipedia

    en.wikipedia.org/wiki/Strabismus_surgery

    Learn about the surgical options to correct the misalignment of the eyes caused by strabismus, a condition that affects the extraocular muscles. Find out how the procedures are performed, what indications they have, and when they were first developed.

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