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Incomitant strabismus cannot be fully corrected by prism glasses, because the eyes would require different degrees of prismatic correction dependent on the direction of the gaze. Incomitant strabismus of the eso- or exo-type are classified as "alphabet patterns": they are denoted as A- or V- or more rarely λ -, Y- or X-pattern depending on the ...
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]
The Maddox rod test can be used to subjectively detect and measure a latent, manifest, horizontal or vertical strabismus for near and distance. The test is based on the principle of diplopic projection. [1] Dissociation of the deviation is brought about by presenting a red line image to one eye and a white light to the other, while prisms are ...
Prism (optics) An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base and rectangular sides.
Specialty. Neurology, ophthalmology. Diplopia is the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. [1] Also called double vision, it is a loss of visual focus under regular conditions, and is often voluntary.
20 September 2022. ( 2022-09-20) Marco and Andrea are 16-year-old identical twins. Marco is shy and afraid to talk to Carola, a girl he likes, so Andrea pretends to be Marco to strike up a friendship with her. Marco was a swimmer, but after suffering an injury, and is unable to swim. Daniele, a boy who swam with Marco and is friends with Andrea ...
The Stand is an American post-apocalyptic fantasy television miniseries comprising nine episodes, based on the 1978 novel of the same name by Stephen King and a remake to the 1994 adaptation. The plot centers on a pandemic resulting from a mishap at a military biological research facility , which allows the escape of a lethal strain of influenza .
High-definition television (HDTV) in the United States was introduced in 1998 and has since become increasingly popular and dominant in the television market. Hundreds of HD channels are available in millions of homes and businesses both terrestrially and via subscription services such as satellite , cable and IPTV .
8VSB. 8VSB is the modulation method used for broadcast in the ATSC digital television standard. ATSC and 8VSB modulation is used primarily in North America; in contrast, the DVB-T standard uses COFDM . A modulation method specifies how the radio signal fluctuates to convey information. ATSC and DVB-T specify the modulation used for over-the-air ...
The standard for consumer/ prosumer HDTV acquisition is HDV (High Definition Video). It records MPEG-2 TS compressed HDTV video on standard DV media (regular DV or MiniDV cassette tape) and transfers it using FireWire. At this time all consumer/prosumer HD camcorders only record at a maximum resolution of 1440x1080.