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The prism cover test ( PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]
USS George H.W. Bush (CVN-77) Ellsworth Air Force Base. The MCU-2/P is a protective mask used by the United States Air Force and United States Navy, originally designed for the US Army as the XM-30 mask. In December 1982, the U.S. Air Force took over the XM-30 mask development. In 1983, the U.S. Navy requested the first masks off the production ...
James Bert Garner. James B. Garner at age 45 around the time he invented the gas mask. Two associates of James Bert Garner wearing his original gas masks. James Bert Garner (September 2, 1870 – November 28, 1960) was an American chemical engineer and professor at the Mellon Institute of Industrial Research from 1914 until his retirement in 1957.
Production history. Designed. 1980s. The M40 field protective mask was one of various protective masks used by the United States Armed Forces and its allies to protect from field concentrations of chemical and biological agents, along with radiological fallout particles. It is not effective in an oxygen deficient environment or against ammonia .
2006–present. Specifications. Weight. 1.9 lbs (M50) The M50 series protective mask, officially known as the Joint Service General Purpose Mask ( JSGPM or JSGPM/M50 ), is a lightweight, protective mask system consisting of the mask, a mask carrier, and additional accessories. It was adopted by the U.S. military in 2006 and is manufactured by ...
A typical industrial-grade gas mask for hazardous chemicals and dust A World War I British P Helmet c. 1915 Zelinsky–Kummant protivogaz, designed in 1915, was one of the first modern-type full-head protection gas masks with a detachable filter and eyelet glasses, shown here worn by U.S. Army soldier (USAWC photo) Indian muleteers and mule wearing gas masks, France, February 21, 1940 A Polish ...
Exophoria. Exophoria is a form of heterophoria in which there is a tendency of the eyes to deviate outward. [1] During examination, when the eyes are dissociated, the visual axes will appear to diverge away from one another. [2] The axis deviation in exophoria is usually mild compared with that of exotropia .
M17 gas mask. M40 field protective mask. MCU-2/P protective mask. Categories: Military equipment of the United States.