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AC 1/4: Grade 1 anterior chamber angle: AC 0/4: Grade 0 anterior chamber angle: closed angle between cornea and iris AC/A: Accommodative convergence / Accommodation ratio the portion of the range of convergence that occurs in response to accommodation: Acc: Accommodation: process of changing optical power to maintain focus as distance changes ...
Rates among adults are between 15 and 49% while rates among children are between 1.2 and 42%. [7] Far-sightedness more commonly affects young children, whose eyes have yet to grow to their full length, and the elderly, who have lost the ability to compensate with their accommodation system .
1 + 1 / 3 Minus-blue filter; complements #32 minus-green and #44A minus-red. Used with Ektachrome or Aerochrome Infrared films to obtain false-color results. Used in ophthalmology and optometry in conjunction with a slit-lamp and a cobalt blue light to improve contrast when assessing the health of the cornea and the fit of contact lenses ...
[1] The stroke width is 1 ⁄ 5 of the diameter, and the gap width is the same. [2] This is identical to the letter C from a Snellen chart. The Landolt C is the standard optotype for acuity measurement in most European countries. It was standardized, together with measurement procedures, by the German DIN, as DIN 58220 (now EN ISO 8596).
A wire signal is a brevity code used by telegraphers to save time and cost when sending long messages. The best-known code was the 92 Code adopted by Western Union in 1859. The code was designed to reduce bandwidth consumption over telegraph lines, thus speeding transmissions by utilizing a numerical code system for frequently used phrases.
An example of the Landolt C eye chart (also known as the Japanese eye chart). Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision, while the ETDRS chart is designed for use at 4 meters. [16]
The optician plaintiff brought suit to have a 1953 Oklahoma law declared unconstitutional and to enjoin state officials from enforcing it. The law at issue (59 Okla. Stat. Ann. §§ 941–947, Okla. Laws 1953, c. 13, §§ 2–8) contained provisions making it unlawful for any person not a licensed optometrist or ophthalmologist to fit lenses to a face or to duplicate or replace into frames ...
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