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A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. Thus a prism of 1 Δ would produce 1 cm visible displacement at 100 cm, or 1 meter. This can be represented mathematically as: = where is the amount of prism correction in prism dioptres, and is the angle of deviation of the light.
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 ...
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 ...
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 ...
Gibson ES Series. The Gibson ES series of semi-acoustic guitars (hollow body electric guitars) are manufactured by the Gibson Guitar Corporation. The letters ES stand for Electric Spanish, to distinguish them from Hawaiian-style lap steel guitars which are played flat on the lap. Many of the original numbers referred to the price, in dollars ...
1958 saw the introduction of Gibson's new thinline series of guitars. The ES-335, 345 and 355, all came with a semi-hollow body: the wood of the top and back was maple and there was a maple center block inside the guitars which ran the length of the body all the way to the mahogany neck, with a rosewood fingerboard.
Electra. Electra was a brand of electric guitars and basses manufactured in Japan and distributed in the US by two companies owned by brothers: Saint Louis Music (SLM) and Pacific Coast Music in the 1970s and early 1980s. In 2013, the brand launched a successful comeback led by renowned luthiers Ben Chafin and Mick Donner.
Filip Forsberg scored a goal and had an assist, and the Nashville Predators beat the Vancouver Canucks 4-1 on Tuesday night to level their best-of-seven playoff series at 1-1. Anthony Beauvillier ...