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  2. Prism correction - Wikipedia

    en.wikipedia.org/wiki/Prism_correction

    Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]

  3. 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 ...

  4. Roof prism - Wikipedia

    en.wikipedia.org/wiki/Roof_prism

    Roof prism. A roof pentaprism used in Single-lens reflex cameras; the lower right face is the roof ( dach ). A roof prism, also called a Dachkanten prism or Dach prism (from German: Dachkante, lit. "roof edge"), is a reflective prism containing a section where two faces meet at a 90° angle, resembling the roof of a building and thus the name.

  5. Prentice position - Wikipedia

    en.wikipedia.org/wiki/Prentice_position

    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.

  6. Compose and send emails in AOL Mail - AOL Help

    help.aol.com/articles/aol-mail-compose-and-contacts

    Compose and send emails in AOL Mail. AOL Mail lets you customize how you want your emails to look when sending messages to your contacts. Send, forward and reply to messages, create and use a...

  7. Here’s why we eat popcorn at the movies - AOL

    www.aol.com/why-eat-popcorn-movies-153016578.html

    A national pastime. On a recent Sunday morning here in South Minneapolis, a decades-long father-son tradition continued at the Riverview Theater, a single-screen cinema nestled among century-old ...

  8. Failure reporting, analysis, and corrective action system

    en.wikipedia.org/wiki/Failure_reporting...

    A failure reporting, analysis, and corrective action system (FRACAS) is a system, sometimes carried out using software, that provides a process for reporting, classifying, analyzing failures, and planning corrective actions in response to those failures. It is typically used in an industrial environment to collect data, record and analyze ...

  9. Dollywood’s got a new attraction for Dolly Parton fans

    www.aol.com/dollywood-got-attraction-dolly...

    The $25 million Big Bear Mountain roller coaster opened last spring, and the new HeartSong Lodge & Resort, the second hotel attached to Dollywood, opened in the fall. Parton told CNN Travel at the ...

  10. 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.

  11. Prism cover test - Wikipedia

    en.wikipedia.org/wiki/Prism_Cover_Test

    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]