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Photograph of a triangular prism, dispersing light Lamps as seen through a prism. In optics, a dispersive prism is an optical prism that is used to disperse light, that is, to separate light into its spectral components (the colors of the rainbow). Different wavelengths (colors) of light will be deflected by the prism at different angles. [1]
Eyebuydirect was founded in 2005 by Roy Hessel, a former venture capitalist. [9] [10] The company launched Eyebuydirect.com in March 2006.[11]In 2007, Eyebuydirect added EyeTry, a "try-on" function, to its site. [9]
At one time, they were officially designated as regulation prescription glasses (RPGs). [ citation needed ] This was commonly said to mean "rape prevention glasses" due to their unstylish appearance. [ citation needed ] At times in the US Navy they were called to " Standard Navy Ugly Glasses " ( SNUGs ).
Google Glass, or simply Glass, is a discontinued brand of smart glasses developed by Google's X Development (formerly Google X), [9] with a mission of producing a ubiquitous computer. [1]
The prismatic lenses of the belay glasses are arranged so as to bend light from above through total internal reflection into the observer's eye, allowing the belayer to observe the climber while maintaining a comfortable head/neck position. The design based on the eyeglasses frame provides for a split field of vision:
The Four Prism Dioptre Reflex Test (also known as the 4 PRT, or 4 Prism Dioptre Base-out Test) is an objective, non-dissociative test used to prove the alignment of both eyes (i.e. the presence of binocular single vision) by assessing motor fusion. [1]