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  2. Horror fusionis - Wikipedia

    en.wikipedia.org/wiki/Horror_fusionis

    Ophthalmology. In ophthalmology, horror fusionis is a condition in which the eyes have an unsteady deviation, with the extraocular muscles performing spasm-like movements that continuously shift the eyes away from the position in which they would be directed to the same point in space, giving rise to diplopia. Even when the double vision images ...

  3. 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.

  4. Sonic Prime - Wikipedia

    en.wikipedia.org/wiki/Sonic_Prime

    Plot. During a battle with Dr. Eggman, Sonic shatters the Paradox Prism, a crystalline artifact with reality-bending powers. This drastically warps reality and creates the "Shatterverse", a new section of the multiverse with five alternate dimensions called "Shatterspaces", each of them formed by one of the Prism shards and inhabited by alternative versions of Sonic's friends (Tails, Knuckles ...

  5. Canon New F-1 - Wikipedia

    en.wikipedia.org/wiki/Canon_New_F-1

    Dimensions. 96.6 × 146.7 × 48.3 mm. Weight. 795 g. Made in. Japan. The Canon New F-1 replaced the F-1n (an upgraded F-1) as Canon 's top-of-the-line 35mm single-lens reflex camera in September 1981. Like the earlier models, the New F-1 takes FD-mount lenses. Although no date has ever been confirmed, it is thought that the last New F-1 was ...

  6. Eye color - Wikipedia

    en.wikipedia.org/wiki/Eye_color

    Eye color. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye 's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [3] : 9. In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of ...

  7. Perger prism - Wikipedia

    en.wikipedia.org/wiki/Perger_prism

    Perger prism. A Perger prism or Perger–Porro prism system is a prism, that is used to invert (rotate by 180°) an image. The special feature of this prism is that, like a traditional double Porro prism system, it manages this with only four beam deflections and has neither a roof edge with the accompanying phase correction problems, a ...

  8. Canon F-1 - Wikipedia

    en.wikipedia.org/wiki/Canon_F-1

    The Canon F-1 is a 35 mm single-lens reflex camera produced by Canon of Japan from March 1971 until the end of 1981, at which point it had been superseded by the New F-1 launched earlier that year. The Canon FD lens mount was introduced along with the F-1, but the previous Canon FL -mount lenses and older R- series lenses were also compatible ...

  9. List of optometric abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_optometric...

    Grade 4 anterior chamber angle. open angle between cornea and iris. AC 3/4. Grade 3 anterior chamber angle. AC 2/4. Grade 2 anterior chamber angle. AC 1/4. Grade 1 anterior chamber angle. AC 0/4.