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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]
The NIOSH air filtration rating is the U.S. National Institute for Occupational Safety and Health (NIOSH)'s classification of filtering respirators. The ratings describe the ability of the device to protect the wearer from solid and liquid particulates in the air. The certification and approval process for respiratory protective devices is ...
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.
The Black Veil Respirator. The German army used chlorine as a poison gas for the first time against Allied troops at the Second Battle of Ypres on 22 April 1915. [1] As an immediate response, the British began issuing cotton wool wrapped in muslin to its troops by 3 May. [2] This was followed by the Black Veil Respirator, invented by John Scott ...
The strength of the prism is increased until the streak of the light passes through the centre of the prism, as the strength of the prism indicates the amount of deviation present. The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens , which refracts light rays so that a point source of light is seen as a ...
Netflix subscribers are making similar complaints about new film Rebel Moon, which is currently the streaming service’s most-watched title.. The new fantasy film is the latest release from ...
Chemical cartridge. Combined gas and particulate respirator filter for protection against acid gases, the type of BKF ( БКФ ). It has a transparent body and special sorbent that changes color after saturation. This color change may be used for timely replacement of respirators' filters, as an end-of-service-life indicator (ESLI).
The Small Box Respirator (SBC) was a British gas mask of the First World War and a successor to the Large Box Respirator. In late 1916, the respirator was introduced by the British with the aim to provide reliable protection against chlorine and phosgene gases. [1] [page needed] The respirator offered a first line of defence against these.
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