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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]
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]
Box office. $4.5 million (US/ Canada) [ 3] Eyewitness (released in the UK as The Janitor) is a 1981 American neo-noir [ 4] thriller film produced and directed by Peter Yates and written by Steve Tesich. It stars William Hurt, Sigourney Weaver, Christopher Plummer, and James Woods. The story involves a television news reporter and a janitor who ...
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.
Nullbulge, the “hacktivist group,” claimed responsibility for the breach and said they leaked a gigantic, roughly 1.2 terabytes of information from Disney’s Slack, a communications software ...
Katy Perry is revealing all her beauty and health essentials — including one tool she stole from Orlando Bloom. While appearing in the latest installment of British Vogue 's "In the Bag" series ...
The Nasdaq Composite was set to plunge into a correction on Friday, falling more than 10% from its July peak after weak employment numbers aggravated worries of a slowdown in the U.S. economy ...
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]
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