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A person taking the test covers one eye from 6 metres or 20 feet away, and reads aloud the letters of each row, beginning at the top. The smallest row that can be read accurately indicates the visual acuity in that specific eye. The symbols on an acuity chart are formally known as "optotypes". Variation of Snellen chart with another letter ...
Three-mile run (or 5000-meter row, if requirements are met) On October 1, 2008, the Marine Corps introduced the additional pass/fail CFT to the fitness requirements. The CFT is designed to measure abilities demanded of Marines in a war zone. [4]
A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.
The 500 metres is an uncommon middle-distance running event in track and field and road running competitions. All-time top 25. i = indoor performance;
A good procedure is a chart, analogous to the familiar Snellen visual acuity chart, in which one letter in each row differs in depth (front or behind) sequentially increasing in difficulty. For children the fly test is ideal: the image of a fly is transilluminated by polarized light; wearing polarizing glasses the wing appears at a different ...
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Indoor tracks longer than 200 meters are considered "oversized" and times are not accepted for record purposes. Indoor sprint races (50 to 60 meters) are held on level straight-aways. American athletes are successful on an international stage with many American records being at the same time world records .