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Convergence insufficiencyis a sensory and neuromuscular anomaly of the binocular visionsystem, characterized by a reduced ability of the eyesto turn towards each other, or sustain convergence. Symptoms. [edit] The symptoms and signs associated with convergence insufficiency are related to prolonged, visually demanding, near-centered tasks. They ...
Exophoria. Exophoria is a form of heterophoria in which there is a tendency of the eyes to deviate outward. [ 1] During examination, when the eyes are dissociated, the visual axes will appear to diverge away from one another. [ 2] The axis deviation in exophoria is usually mild compared with that of exotropia .
Another version of this text is found on what is known as the Sennacherib Prism, now in the Oriental Institute. It was purchased by James Henry Breasted from a Baghdad antiques dealer in 1919 for the Oriental Institute. [6] The Jerusalem prism was acquired by the Israel Museum at a Sotheby's auction in 1970. [7] It was only published in 1990. [8]
Children. 1. Alexander Scourby ( / ˈskɔːrbi /; November 13, 1913 – February 22, 1985) was an American film, television, and voice actor and narrator known for his deep and resonant voice and Mid-Atlantic accent. [ 1] He is best known for his film role as the ruthless mob boss Mike Lagana in Fritz Lang 's The Big Heat (1953), and is also ...
Fixation disparity. Fixation disparity is a tendency of the eyes to drift in the direction of the heterophoria. While the heterophoria refers to a fusion-free vergence state, the fixation disparity refers to a small misalignment of the visual axes when both eyes are open in an observer with normal fusion and binocular vision. [1]
The prism cover test ( PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]
Alexander disease is a genetic disorder affecting the midbrain and cerebellum of the central nervous system. It is caused by mutations in the gene for glial fibrillary acidic protein (GFAP) [ 4][ 5][ 6] that maps to chromosome 17q 21. It is inherited in an autosomal dominant manner, such that the child of a parent with the disease has a 50% ...
Maddox rod. 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 ...