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  2. Ocular myasthenia - Wikipedia

    en.wikipedia.org/wiki/Ocular_myasthenia

    Ocular myasthenia gravis (MG) is a disease of the neuromuscular junction resulting in hallmark variability in muscle weakness and fatigability. MG is an autoimmune disease where anomalous antibodies are produced against the naturally occurring acetylcholine receptors in voluntary muscles. MG may be limited to the muscles of the eye (ocular MG ...

  3. The Black Prism - Wikipedia

    en.wikipedia.org/wiki/The_Black_Prism

    The Black Prism is a fantasy novel by American author Brent Weeks. It is the first entry in the five-volume [1] Lightbringer Series, and follows the 'Prism' Gavin Guile, the most powerful person in the world, [2] as he fights against an uprising by a self-proclaimed king. The book is described by the author as "a story of normal brothers—who ...

  4. Strabismus - Wikipedia

    en.wikipedia.org/wiki/Strabismus

    Strabismus is a vision disorder in which the eyes do not properly align with each other when looking at an object. The eye that is pointed at an object can alternate. The condition may be present occasionally or constantly. If present during a large part of childhood, it may result in amblyopia, or lazy eyes, and loss of depth perception.

  5. Dichroic prism - Wikipedia

    en.wikipedia.org/wiki/Dichroic_prism

    Dichroic prism. A dichroic prism is a prism that splits light into two beams of differing wavelengths (colour). A trichroic prism assembly combines two dichroic prisms to split an image into 3 colours, typically as red, green and blue of the RGB colour model. They are usually constructed of one or more glass prisms with dichroic optical ...

  6. Binoculars - Wikipedia

    en.wikipedia.org/wiki/Binoculars

    8×42 roof prism binoculars with rainguard and opened tethered lens caps. Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects.

  7. Flashes Before Your Eyes - Wikipedia

    en.wikipedia.org/wiki/Flashes_Before_Your_Eyes

    Production. "Flashes Before Your Eyes" was the 15th episode of the series directed by Jack Bender. The episode was written by Damon Lindelof and Drew Goddard; the pair had never before collaborated on an episode. This episode is the first to deal with the concept of time travel, the next being "The Constant" in the fourth season.

  8. Porro prism - Wikipedia

    en.wikipedia.org/wiki/Porro_prism

    Porro prisms are most often used in pairs, forming a double Porro prism. A second prism rotated 90° with respect to the first, is placed such that light will traverse both prisms. The net effect of the prism system is a beam parallel to but displaced from its original direction, with the image rotated 180°. A double Porro system provides four ...

  9. Flash suppression - Wikipedia

    en.wikipedia.org/wiki/Flash_suppression

    Flash suppression occurs due to the conflict between the inputs to the two eyes. When this conflict is sustained without any abrupt events, binocular rivalry occurs. In both flash suppression and binocular rivalry, perceptual conflict between the two eyes is required for the perceptual effect. If two similar images are used, fusion of the two ...

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