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Either BASE IN for an exodeviation (eye turned out), BASE OUT for an esodeviation (eye turned in), BASE UP for a hypodeviation (eye turned down) or BASE DOWN for a hyperdeviation (eye turned up). [5] Steps: 1. The patient should be measured in primary position first and then in any other positions of gaze of concern.
Prism correction is measured in prism dioptres. A prescription that specifies prism correction will also specify the "base". The base is the thickest part of the lens and is opposite from the apex. Light will be bent towards the base and the image will be shifted towards the apex.
If the patient saw a red line to the left and white light to the right, they are said to have exotropia or exophoria (crossed diplopia) in which base in (BI) prisms of increasing strength are used until the lines are superimposed.
Heterophoria is an eye condition in which the directions that the eyes are pointing at rest position, when not performing binocular fusion, are not the same as each other, or, "not straight". This condition can be esophoria, where the eyes tend to cross inward in the absence of fusion; exophoria, in which they diverge; or hyperphoria, in which ...
Darcy–Weisbach equation. In fluid dynamics, the Darcy–Weisbach equation is an empirical equation that relates the head loss, or pressure loss, due to friction along a given length of pipe to the average velocity of the fluid flow for an incompressible fluid. The equation is named after Henry Darcy and Julius Weisbach.
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.
Nord Stream 2 ( German – English mixed expression for "North Stream 2"; Russian: Северный поток — 2) is a 1,234-kilometre-long (767 mi) natural gas pipeline from Russia to Germany running through the Baltic Sea, [2] financed by Gazprom and several European energy companies. Feasibility studies began in 2011 to expand the Nord ...
Pipe A of NS2 is inoperable. Pipe B remains undamaged. On 26 September 2022, a series of underwater explosions and consequent gas leaks occurred on the Nord Stream 1 (NS1) and Nord Stream 2 (NS2) natural gas pipelines, two of 23 gas pipelines between Europe and Russia. [8] Both pipelines were built to transport natural gas from Russia to ...
A cover test or cover-uncover test is an objective determination of the presence and amount of ocular deviation. It is typically performed by orthoptists, ophthalmologists and optometrists during eye examinations . The two primary types of cover tests are: the alternating cover test. the unilateral cover test (or the cover-uncover test).
Maximum discharge. 25.5 billion cubic meters per year. Diameter. 42 to 44 in (1,067 to 1,118 mm) The Langeled pipeline (originally known as Britpipe) is an underwater gas pipeline transporting Norwegian natural gas to the United Kingdom. Before the completion of the Nord Stream 1 pipeline, it was the longest subsea pipeline in the world.