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Transitions Optical is a U.S.-based company known for manufacturing photochromic lenses, which darken on exposure to specific types of light. The company was founded in 1990. [1] In 1991, Transitions Optical became the first company to commercialize and manufacture plastic photochromic lenses. [2]
Visionworks of America, Inc. (formerly known as Doctors' Value Vision) is an American company which operates or manages 711 optical retail stores in 40 U.S. states and the District of Columbia. [1] [2] [3] The company was incorporated in 1988. It is based in Downtown San Antonio, Texas, and has about 8,000 employees.
Cohen's Fashion Optical was the first to offer on-premise eye examinations with qualified Doctors of Optometry. [citation needed] On March 3, 2008, Houchens Industries completed its acquisition of Cohen's with hopes of expanding the regional optical retail chain into a national chain. The current president, Robert Cohen remained as president of ...
The U.S. Government specified the shape of the lens and the color, which was initially a green-tinted lens that transmitted 50% of incoming visible daylight. This AN6531 Type 1 lens proved insufficient to protect pilot's eyes from sun glare so this lens was superseded by the darker AN6531 Type 2 lens in rose smoke.
In 1987, JJV introduces the world’s first disposable soft contact lenses under the name ACUVUE Brand Contact Lenses. [3] AMO was spun off from Allergan in 2002. [5] In 2004, Advanced Medical Optics bought Pfizer’s surgical ophthalmology business for $450 million in cash. [6]
EnChroma lenses are composed primarily of an optical notch filter that selectively filters wavelengths of light in the part of the spectrum where the M- and L-opsin sensitivities overlap, namely 530-560 nm, thereby removing light that excites both opsin types and decorrelating the signals between the M- and L-cones.
Automated optical inspection (AOI) is an automated visual inspection of printed circuit board (PCB) (or LCD, transistor) manufacture where a camera autonomously scans the device under test for both catastrophic failure (e.g. missing component) and quality defects (e.g. fillet size or shape or component skew). It is commonly used in the ...
Optical manufacturing and testing is the process of manufacturing and testing optical components. It spans a wide range of manufacturing procedures and optical test configurations. The manufacture of a conventional spherical lens typically begins with the generation of the optic's rough shape by grinding a glass blank. [1]