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oculus sinister (left eye) OU oculus uterque (both eyes) PD Pupillary distance PERRLA Pupils equal, round, reactive to light and accommodation PH Pinhole see Pinhole occluder and Visual_acuity#Legal_definitions: PHNI Pinhole No Improvement see Pinhole occluder and Visual_acuity#Legal_definitions: PHVA Pinhole Visual Acuity: PL Perception of light
Acronym Finder (AF) is a free, online, searchable dictionary and database of abbreviations (acronyms, initialisms, and others) and their meanings. The entries are classified into categories such as Information Technology, Military/Government, Science, Slang/Pop Culture etc. It also contains a database of the United States and Canadian postal codes.
ROTSE – (observing program/telescope) Robotic Optical Transient Search Experiment, an observing program for detecting the optical counterparts of gamma ray bursts; also the telescopes used in this program; RQQ – (celestial object) radio-quiet quasar a quasar that produces weak radio emission
An informal abbreviation used in discussion forums. Usually subjective, though some studies have analysed mathematically quantifiable components of image quality. [18] IR: Infrared. The electromagnetic radiation with wavelengths longer than about 700 nm and not visible to the human eye. [19] IS: Image stabilization. Technology to minimize image ...
Subscripts 1 and 2 refer to initial and final optical media respectively. These ratios are sometimes also used, following simply from other definitions of refractive index, wave phase velocity, and the luminal speed equation:
The Telecommunications Industry Association's TIA-598-C Optical Fiber Cable Color Coding is an American National Standard that provides all necessary information for color-coding optical fiber cables in a uniform manner.
The human eye functions by focusing light onto a layer of photoreceptor cells called the retina, which forms the inner lining of the back of the eye. The focusing is accomplished by a series of transparent media. Light entering the eye passes first through the cornea, which provides much of the eye's optical power.
Scientific terminology is the part of the language that is used by scientists in the context of their professional activities. While studying nature, scientists often encounter or create new material or immaterial objects and concepts and are compelled to name them.