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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]
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 multifocal lenses can correct defective vision in multiple focus, for example: near-vision as well as far-vision. This are particularly beneficial for presbyobia. Contact lenses. Alternatively, many people choose to wear contact lenses. One style is hard contact lenses, which can distort the shape of the cornea to a desired shape.
The quality of products and happy employees make Costco the "Anti-Walmart," writes Steven Greenhouse at the New York Times. He details the six-part strategy by CEO Jim Sinegal that helped Costco ...
Gold Star Executive membership costs $120 a year while Gold Star membership costs $60 a year, but you might be able to recoup the cost -- and then some -- with the executive membership's 2% cash ...
Costco was the second-favorite retailer, with 12.61% of respondents. Amazon came in third, with 12.11%; local grocery chains like Kroger and Publix came in fourth with 11.11%; Sam’s Club came in ...