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Yoked prism can move the image away from primary gaze without the need for a constant head tilt or turn. 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.
Prism (optics) An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base and rectangular sides.
A 1950s radium clock, exposed to ultraviolet light to increase luminescence. Radium dials are watch, clock and other instrument dials painted with luminous paint containing radium-226 to produce radioluminescence. Radium dials were produced throughout most of the 20th century before being replaced by safer tritium -based luminous material in ...
HowToBasic is an Australian YouTube comedy channel that is part of the WBD Ad Sales network, with over 17 million subscribers. The creator of the videos does not speak or show his face, and remains anonymous. The channel primarily features bizarre and destructive visual gags disguised as how-to tutorials. The channel first gained popularity in ...
Taylor Swift is giving back on her Eras Tour. The pop superstar is being praised for her “incredible” donations to food banks in the U.K. cities that hosted her Eras Tour this month. The ...
Yes, the chin strap looks as dramatic as it sounds: It’s a piece of fabric wrapped around the head or ears to keep one’s chin in place — more suitable as protective gear than for a ...
The CDK Global cyberattack outage that crippled dealerships across North America appears to be finally on a path toward resolution, but lost sales and service revenue could be substantial.
The original video by Pinkfong is now the most viewed video on the site. On October 29, 2020, Baby Shark surpassed 7 billion views, and on November 2, 2020, it passed Despacito to become the most viewed video on YouTube. On February 23, 2021, Baby Shark surpassed 8 billion views, becoming the first video to do so.