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The title of their invention was simply an "optometrist instrument", and the text described it as an optometer. Patent 1,804,690 was granted to the Greens and Hunsicker in 1931, and sold to Bausch & Lomb (B&L), which had them redesign it (patent 1,873,356, granted 1932). B&L trademarked it as "Greens' Refractor" and introduced it in 1934.
Keratometer. A keratometer, also known as an ophthalmometer, is a diagnostic instrument for measuring the curvature of the anterior surface of the cornea, particularly for assessing the extent and axis of astigmatism. It was invented by the German physiologist Hermann von Helmholtz in 1851, although an earlier model was developed in 1796 by ...
Contact lenses. to correct refractive errors of the eye; a little invasive. Phoropter. used in refraction testing. Tonometers. used to determine the intraoccular pressure (IOP) - useful in glaucoma; video link for various types of tonometers. Speculum: to keep the eyes open during any operation. Universal eye speculum.
Bausch & Lomb (since 2010 stylized as Bausch + Lomb[ 2]) is an American-Canadian eye health products company based in Vaughan, Ontario, Canada. It is one of the world's largest suppliers of contact lenses, [ 3] lens care products, pharmaceuticals, intraocular lenses, and other eye surgery products. [ 4][ 5] The company was founded in Rochester ...
Optometer (ophthalmic instrument) The optometer was a device used for measuring the necessary spherical and/or cylindrical corrections to be prescribed for eyeglasses, from the middle of the 18th century until around 1922, when modern instruments were developed. [1] [2] [3] The term, coined in 1738 by W. Porterfield to describe his Scheiner ...
Bausch & Lomb Ultra, Bausch & Lomb Ultra for Astigmatism, Bausch & Lomb Ultra for Presbyopia Elastofilcon: 0.2: 340: SilSoft Aphakic, SilSoft Super Plus Kalifilcon A 55 134 [25] 0.5: 0.08: Bausch & Lomb INFUSE Asmofilcon A 40 161 [26] 0.9: 0.08: Miru 1month Verofilcon A 51-80 (water gradient) 100 0.6: 0.09: Alcon Precision1, Alcon Precision1 ...
Website. ray-ban .com. Ray-Ban is a brand of luxury sunglasses and eyeglasses created in 1936 by Bausch & Lomb. The brand is best known for its Wayfarer and Aviator lines of sunglasses. In 1999, Bausch & Lomb sold the brand to Italian eyewear conglomerate Luxottica Group for a reported $640 million. [ 1][ 2]
A stereoscopic rangefinder or stereoscopic telemeter[ 1] is an optical device that measures distance from the observer to a target, using the observer's capability of binocular vision. It looks similar to a coincidence rangefinder, which uses different principles and has only one eyepiece. German instruments tended to use the stereoscopic ...
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