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Near point of convergence or no previous correction NRC Normal retinal correspondence NV Near vision NWT Normal wearing time o symptoms Zero symptoms ϕ Horizontal orthophoria θ Vertical orthophoria ⊕ Horizontal and vertical orthophoria OC's Optical centres Occ. Occupation OD oculus dexter (right eye) OH Ocular history OMB Oculo motor balance
First-order rotating catadioptric Fresnel lens, dated 1870, displayed at the Musée national de la Marine, Paris.In this case the dioptric prisms (inside the bronze rings) and catadioptric prisms (outside) are arranged to concentrate the light from the central lamp into four revolving beams, seen by sailors as four flashes per revolution.
Al-Sayyid Shaykh bin Ahmad al-Hadi (born on November 22 1867 in Kampung Hulu, Malacca, died on February 20 1934 in Jelutong on Penang), also spelled Syed Sheikh al-Hady, was a Malay-Arab Arab entrepreneur, publicist and writer in British Malaya, who was one of the pioneers of the Malay educational and nationalist movement and advocated rationalist-oriented reform of Islam in the Malay Archipelago.
Prism spectacles with a single prism perform a relative displacement of the two eyes, thereby correcting eso-, exo, hyper- or hypotropia. In contrast, spectacles with prisms of equal power for both eyes, called yoked prisms (also: conjugate prisms, ambient lenses or performance glasses) shift the visual field of both eyes to the same extent. [5]
"Right Here, Right Now" is a song by British big beat musician Fatboy Slim, released on 19 April 1999 as the fourth single from his second studio album, You've Come a Long Way, Baby (1998). The song samples "Ashes, the Rain & I" by James Gang and an Angela Bassett quote from American science fiction thriller film Strange Days (1995). [ 2 ] "
Binoculars may have eye relief ranging from a few millimeters to 25 mm or more. Eye relief can be particularly important for eyeglasses wearers. The eye of an eyeglasses wearer is typically farther from the eye piece which necessitates a longer eye relief in order to avoid vignetting and, in the extreme cases, to conserve the entire field of view.
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