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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]
That victory proved to be the catalyst for Murray’s first – and long awaited – triumph in SW19 the following year as he became the first British man in 77 years to lift the Wimbledon trophy.
Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.
Canyon City, Oregon. / 44.39306°N 118.94944°W / 44.39306; -118.94944. Canyon City is a city in Grant County, Oregon, United States. It is the county seat of Grant County, and is about 2 miles (3 km) south of John Day on U.S. Highway 395. As of the 2010 census, the city had a total population of 703.
541. FIPS code. 41-40700 [ 4] GNIS feature ID. 2412870 [ 2] Lakeview is a town in Lake County, Oregon, United States. The population was 2,418 at the 2020 census. It is the county seat of Lake County. The city bills itself as the "Tallest Town in Oregon" because of its elevation, 4,757 feet (1,450 m) above sea level.
Aberrations of the eye. The eye, like any other optical system, suffers from a number of specific optical aberrations. The optical quality of the eye is limited by optical aberrations, diffraction and scatter. [1] Correction of spherocylindrical refractive errors has been possible for nearly two centuries following Airy's development of methods ...
A halo (from Ancient Greek ἅλως (hálōs) 'threshing floor, disk') [ 1] is an optical phenomenon produced by light (typically from the Sun or Moon) interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky.
In Kosovo, a state-owned energy company plans to destroy a village to make way for expanded coal mining as the government and the World Bank plan for a proposed coal-burning power plant. The government has already forced roughly 1,000 residents from their homes. Many former residents claim officials violated World Bank policy requiring borrowers to restore their living conditions at equal or ...
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