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Corrective lens. A pair of contact lenses, positioned with the concave side facing upward. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia.
4 dioptre prism, either loose or prism bar; Bright lighting conditions; Method of assessment. As it is an objective test, few instructions are required to be given to the patient. The patient is asked to fixate on a target while the examiner places a 4 prism dioptre base-out prism over the patient's eye, observing the response of the fellow eye.
Billy Mays. William Darrell Mays Jr. (July 20, 1958 – June 28, 2009) [2] [3] was an American television direct-response advertisement salesperson. Throughout his career, he promoted a wide variety of products, including OxiClean, Orange Glo, Kaboom, Zorbeez, and Mighty Mendit.
The strength of the prism is increased until the streak of the light passes through the centre of the prism, as the strength of the prism indicates the amount of deviation present. The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens , which refracts light rays so that a point source of light is seen as a ...
The Shopping Channel. The Shopping Channel is a New Zealand 24/7 Infomercial channel which is broadcast on Sky satellite. [1] The company was founded in 2010 [2] and went live on 1 October 2012. [3] The Shopping Channel was owned by entrepreneur Greg Partington [4] and is headquartered in Auckland, New Zealand .
PRISM is a code name for a program under which the United States National Security Agency (NSA) collects internet communications from various U.S. internet companies. [1] [2] [3] The program is also known by the SIGAD US-984XN. [4] [5] PRISM collects stored internet communications based on demands made to internet companies such as Google LLC ...
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