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The Four Prism Dioptre Reflex Test (also known as the 4 PRT, or 4 Prism Dioptre Base-out Test) is an objective, non-dissociative test used to prove the alignment of both eyes (i.e. the presence of binocular single vision) by assessing motor fusion. [1] Through the use of a 4 dioptre base out prism, diplopia is induced which is the driving force for the eyes to change fixation and therefore re ...
Micropsia is a condition affecting human visual perception in which objects are perceived to be smaller than they actually are. Micropsia can be caused by optical factors (such as wearing glasses), by distortion of images in the eye (such as optically, via swelling of the cornea or from changes in the shape of the retina such as from retinal ...
Numerous military installations have been located in Michigan since the earliest French fortified trading posts appeared to modern National Guard bases. The Native Americans of the area established only temporary war camps although some were quite large ( Chief Pontiac 's 6-month encampment during the siege of Fort Detroit had around 1,000 warriors). The earliest French bases were quite small ...
The United States Air Force (USAF) deployed combat aircraft to Thailand from 1960 to 1975 during the Vietnam War. Today, US military units train with other Asian militaries in Thailand. Royal Thai Air Force Bases are an important element in the Pentagon 's "forward positioning" strategy.
Camp TURKSOM ( Somali: Xerada TURKSOM, Turkish: Somali Türk Görev Kuvveti Komutanlığı) is a Turkish military base and a defence university in Mogadishu, Somalia. Since its inception, Camp TURKSOM serves as the main hub of the task force dubbed "African Eagle" in which Turkey aims to train and prepare the officers and NCOs of the Somali ...
T. RAF Tilstock. RAF Tern Hill. Categories: Royal Air Force stations in England. Organisations based in Shropshire. Buildings and structures in Shropshire. Transport in Shropshire. Military history of Shropshire.
Prism (optics) An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled — elements with two parallel surfaces are not prisms. The most familiar type of optical prism is the triangular prism, which has a triangular base and rectangular sides.
RAF Winkleigh. Categories: Royal Air Force stations in England. Organisations based in Devon. Geography of Devon. Military history of Devon. Airports in Devon.