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Esotropia is a form of strabismus in which one or both eyes turn inward. The condition can be constantly present, or occur intermittently, and can give the affected individual a "cross-eyed" appearance. [1] It is the opposite of exotropia and usually involves more severe axis deviation than esophoria. Esotropia is sometimes erroneously called ...
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 ...
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]
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.
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 ...
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 ...
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.
Language Family Branch First-language (L1) speakers Second-language (L2) speakers Total speakers (L1+L2) English (excl. creole languages) Indo-European: Germanic: 380 million 1.077 billion: 1.456 billion Mandarin Chinese (incl. Standard Chinese, but excl. other varieties) Sino-Tibetan: Sinitic: 939 million 199 million: 1.138 billion Hindi (excl ...
Mid 19th century. Combined identification in [1903] Present location. British Museum. Sargon II's Prisms are two Assyrian tablet inscriptions describing Sargon II 's (722 to 705 BC) campaigns, discovered in Nineveh in the Library of Ashurbanipal. The Prisms today are in the British Museum.
Hafiz Mehmood Shirani (1880–16 February 1946) was an Indian researcher and poet during the British era [1] and father of Urdu poet Akhtar Sheerani. He started teaching Urdu at Islamia College, Lahore in 1921. [2] In 1928 he moved to Oriental College, Lahore. He was a researcher and his popular theory was "Punjab Mein Urdu" which made him famous.