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Esophoria is an eye condition involving inward deviation of the eye, usually due to extra-ocular muscle imbalance. It is a type of heterophoria. Cause. Causes include: Refractive errors; Divergence insufficiency; Convergence excess; this can be due to nerve, muscle, congenital or mechanical anomalies.
Maddox wing. The Maddox Wing is an instrument utilized by ophthalmologists, orthoptists and optometrists in the measurement of strabismus (misalignment of the eyes; commonly referred to as a squint or lazy eye by the lay person). It is a quantitative and subjective method of measuring the size of a strabismic deviation by dissociation of the ...
The Cambridge Grammar of the English Language ( CamGEL [n 1]) is a descriptive grammar of the English language. Its primary authors are Rodney Huddleston and Geoffrey K. Pullum. Huddleston was the only author to work on every chapter. It was published by Cambridge University Press in 2002 and has been cited more than 8,000 times.
The history of English grammars [1] [2] begins late in the sixteenth century with the Pamphlet for Grammar by William Bullokar. In the early works, the structure and rules of English grammar were based on those of Latin. A more modern approach, incorporating phonology, was introduced in the nineteenth century.
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 ...
Definition. Although the style and content of grammar-books varies enormously, they generally aim for a fairly systematic and comprehensive survey of one language's phonetics, morphology, syntax and word-formation. Since languages vary across time, space, social groups, genres, and so forth, grammars inevitably cannot represent every single ...
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 ...
Six. Warriner's English Grammar and Composition is a series of textbooks on English grammar and composition by John E. Warriner, consisting initially of six books targeted at grades 6 through 12, in numerous editions, with publication beginning in 1946 and a 7th book added in 1959. [1] Last revised in 1981, the series was still in print at 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]
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 .