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The aim of an accurate intraocular lens power calculation is to provide an intraocular lens (IOL) that fits the specific needs and desires of the individual patient. The development of better instrumentation for measuring the eye's axial length (AL) and the use of more precise mathematical formulas to perform the appropriate calculations have significantly improved the accuracy with which the ...
Toric Markers are markers made for marking on the outside of the cornea or sclera part of the eye. They are designed with semi-sharp or pointed line or dot patterns. There are two kinds of markers - Pre-Op markers and Intra-Op markers. [1] Pre-Op markers: these are used before the patient lies down for surgery.
A toric IOL is a type of toric lens used to correct preexisting corneal astigmatism at the time of cataract surgery. [20] Astigmatism can also be treated with limbal relaxing incisions or an excimer laser procedure. [21] [22] About 40% of Americans have significant astigmatism and thus may be candidates for a toric IOL. [22]
Toric lens surface as "cap" (top-right) from a torus (here with R = 1.2 r). A toric lens is a lens with different optical power and focal length in two orientations perpendicular to each other. One of the lens surfaces is shaped like a "cap" from a torus (see figure at right), and the other one is usually spherical .
Diane Maclagan (born 1974), expert on toric varieties, Hilbert schemes, and tropical geometry; Chrystal Macmillan (1872–1937), Scottish Liberal politician, barrister, feminist and pacifist, first female honours graduate in mathematics from University of Edinburgh; Jessie MacWilliams (1917–1990), English researcher on error-correcting codes
The Barrett Optical Ranging System (BORS) was an integrated ballistics computer manufactured by Barrett Firearms that aids snipers and long-range marksmen in taking precise and accurate shots. The system mounts directly to the riflescope and couples with the elevation knob. With the aid of the BORS, marksmen can rapidly account for temperature ...
In modular arithmetic, Barrett reduction is an algorithm designed to optimize the calculation of [1] without needing a fast division algorithm. It replaces divisions with multiplications, and can be used when n {\displaystyle n} is constant and a < n 2 {\displaystyle a<n^{2}} .
The need to convert a and b into Montgomery form and their product out of Montgomery form means that computing a single product by Montgomery multiplication is slower than the conventional or Barrett reduction algorithms.