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Anisometropia is caused by common refractive errors, such as astigmatism, far-sightedness, and myopia, in one eye. [ 6] Anisometropia is likely the result of both genetic and environmental influences. [ 7] Some studies suggest, in older adults, developing asymmetric cataracts may cause worsen anisometropia.
Prism correction is measured in prism dioptres. A prescription that specifies prism correction will also specify the "base". The base is the thickest part of the lens and is opposite from the apex. Light will be bent towards the base and the image will be shifted towards the apex.
Esotropia. 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.
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 ...
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.
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 ...
Sennacherib's Annals are the annals of the Assyrian king Sennacherib.They are found inscribed on a number of artifacts, and the final versions were found in three clay prisms inscribed with the same text: the Taylor Prism is in the British Museum, the Oriental Institute Prism in the Oriental Institute of Chicago, and the Jerusalem Prism is in the Israel Museum in Jerusalem.
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 ...