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Computer glasses may refer to: Blue-light blocking glasses, to try to reduce eyestrain from computer use; Smartglasses, glasses with computer technology
A vertical bell lyre in use by the National Marching Band of the RAF Air Cadets. In the United Kingdom, the United States, and Canada, a form of glockenspiel is called a bell lyre, bell lyra, or lyra-glockenspiel. [11] The bell lyre is a form of glockenspiel commonly used in marching bands. [12]
Another keyboard instrument used in the orchestra, as well as jazz, is the vibraphone. The most commonly requested excerpt for vibraphone at orchestral auditions is from Leonard Bernstein's "West Side Story." The "Little Blue Devil" movement from "Seven Studies on Themes of Paul Klee" by Gunther Schuller is also frequently requested.
The American Academy of Ophthalmology (AAO) does not recommend special eyewear for computer use, [13] [14] although it recommends using prescription glasses measured specifically for computer screen distance (depending on individuals, but possibly 20–26 inches from the face), which are not the same as "blue-light blocking" glasses. [21]
Maurice Ravel preferred the keyboard version of the instrument because it can play a true ff dynamic for brilliance and iridescence in orchestral climaxes. [3] In the late 20th century, the firm of Bergerault began manufacturing a three-octave (F 2 –E 4 ) mallet instrument with a damping mechanism operated by a foot pedal, which is capable of ...
The lens color is not a guarantee either. Lenses of various colors can offer sufficient (or insufficient) UV protection. Regarding blue light, the color gives at least a first indication: Blue blocking lenses are commonly yellow or brown, whereas blue or gray lenses cannot offer the necessary blue light protection.
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