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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
Barksdale Air Force Base ( Barksdale AFB) ( IATA: BAD, ICAO: KBAD, FAA LID: BAD) is a United States Air Force (USAF) base in Bossier Parish, Louisiana, in northwest Louisiana. Much of the base is within the city limits of Bossier City, Louisiana, along the base's western and northwestern edge. [2] Barksdale AFB occupies more than 22,000 acres ...
Glasses, surgery [3] Frequency. ~2% (children) [3] Strabismus is a vision disorder in which the eyes do not properly align with each other when looking at an object. [2] The eye that is pointed at an object can alternate. [3] The condition may be present occasionally or constantly. [3]
Pentagrammic prism. In geometry, the pentagrammic prism is one of an infinite set of nonconvex prisms formed by square sides and two regular star polygon caps, in this case two pentagrams . It is a special case of a right prism with a pentagram as base, which in general has rectangular non-base faces. Topologically it is the same as a convex ...
The RAF Force Protection Force Headquarters was created in 2004 as the successor to the Tactical Survive to Operate Headquarters (Tac STO HQ). It controls the Force Protection Wings which are tasked with protection of RAF stations in the UK and overseas. Each Wing is based around a mix of RAF Regiment and RAF Police squadrons and other support ...
Tajikistan – airbases at Farkhor and Western Dushanbe [1] [2] [3] - airbase at Ayni Air Force Base, also known as Gissar Air Base, is a military air base in Tajikistan, 10 km (6.2 mi) west of the capital Dushanbe.The base is jointly operated by the Indian Air Force and the Tajik Air Force. It is India's second overseas air base after Farkhor.
convex. Net. In geometry, the augmented triangular prism is a polyhedron constructed by attaching an equilateral square pyramid onto the square face of a triangular prism. As a result, it is an example of Johnson solid. It can be visualized as the chemical compound, known as capped trigonal prismatic molecular geometry .
Dissociated vertical deviation. Dissociated vertical deviation ( DVD) is an eye condition which occurs in association with a squint, typically infantile esotropia. The exact cause is unknown, although it is logical to assume it is from faulty innervation of eye muscles.