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Glasses. Glasses, also known as eyeglasses and spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces, that rest over the ears. Glasses are typically used for vision correction, such ...
Adjustable-focus eyeglasses. Adjustable focus eyeglasses are eyeglasses with an adjustable focal length. They compensate for refractive errors (such as presbyopia) by providing variable focusing, allowing users to adjust them for desired distance or prescription, or both. Current bifocals and progressive lenses are static, in that the user has ...
These bifocals are upside down as they rest on the surface. The add segment of the lens for near vision is the D-shaped area. A bifocal is a lens with two sections, separated by a line (see image to the right). Generally, the upper part of the lens is used for distance vision, while the lower segment is used for near vision.
The unexpectedly viral product comes at a time that Walgreens has a lot on its plate that isn’t fun — debt piling up, employee unrest, competitors grabbing market share, store closures, its ...
Boeing's stock hit an all-time high of $180 in 2019, roughly two years after the first 737 Max delivery. But it was all downhill from there after a series of plane crashes and software ...
USA TODAY. Clay Aiken's son Parker, 15, makes his TV debut, looks like his father's twin. Finance. Finance. NBC Universal. Stocks rally for second-straight day, with the Dow up 200 points.
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