WebEtymology [ edit] The term "optometry" comes from the Greek words ὄψις ( opsis; "view") and μέτρον ( metron; "something used to measure", "measure", "rule"). The word entered the language when the instrument for measuring vision was called an optometer, (before the terms phoropter or refractor were used). WebEtymology Latin refractus, past participle of refringere to break open, break up, from re- + frangere to break — more at break First Known Use 1612, in the meaning defined at sense …
refraction - Wiktionary
Webrefraction. : the deflection from a straight path undergone by a light ray or a wave of energy in passing obliquely from one medium (as air) into another (as water or glass) in which its velocity is different. Webetymology: [noun] the history of a linguistic form (such as a word) shown by tracing its development since its earliest recorded occurrence in the language where it is found, by tracing its transmission from one language to another, by analyzing it into its component parts, by identifying its cognates in other languages, or by tracing it and ... the practice of not thinking book
Refracting Definition, Meaning & Usage FineDictionary.com
WebJan 28, 2024 · refract ( third-person singular simple present refracts, present participle refracting, simple past and past participle refracted ) ( intransitive, of light) To change direction as a result of entering a different medium. ( transitive, optics) To cause (light) to change direction as a result of entering a different medium. WebAxis of refraction Chambers's Twentieth Century Dictionary Axis of refraction the continuation of the same line through the refracting medium Etymology Chambers's Twentieth Century Dictionary L. axis; cf. Gr. axōn, Sans. aksha, A.S. eax . Usage in scientific papers Fig. 5 (a-e). WebEtymology: [F. rfraction.] Freebase (0.00 / 0 votes) Rate this definition: Refraction Refraction is the change in direction of a wave due to a change in its optical medium. Refraction is essentially a surface phenomenon. The phenomenon is mainly in governance to the law of conservation of energy and momentum. sift cv.xfeatures2d_sift .create