refraction

refraction of light

i: angle of incidence

r: angle of refraction

re·frac·tion

(rĭ-frăk′shən)

1. The deflection of a wave, such as a light or sound wave, when it passes obliquely from one medium into another having a different index of refraction.

2. Astronomy The apparent change in position of a celestial object caused by the bending of light rays as they enter Earth's atmosphere.

3. Medicine

a. The ability of the eye to bend light so that an image is focused on the retina.

b. Determination of this ability in an eye.

re·frac′tion·al, re·frac′tive adj.

re·frac′tive·ly adv.

re·frac′tive·ness, re′frac·tiv′i·ty (rē′frăk-tĭv′ĭ-tē) n.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

refractive

(rɪˈfræktɪv)

adj

1. (General Physics) of or concerned with refraction

2. (General Physics) (of a material or substance) capable of causing refraction

reˈfractively adv

reˈfractiveness, refractivity n

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

re•frac•tive

(rɪˈfræk tɪv)

adj.

1. of or pertaining to refraction.

2. having power to refract.

[1665–75; < Late Latin refrāctīvus (of pronouns) reflexive. See refract, -ive]

re•frac′tive•ly, adv.

re•frac′tive•ness, n.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Adj.	1.	refractive - of or relating to or capable of refraction; "the refractive characteristics of the eye" refractile
	2.	refractive - capable of changing the direction (of a light or sound wave) deflective crooked - having or marked by bends or angles; not straight or aligned; "crooked country roads"; "crooked teeth"

Translations

rifrangente rifrattivo

refractive

[rɪˈfræktɪv] ADJ → refractivo

Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

refractive

adj material, surface → brechend

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

refractive

[rɪˈfræktɪv] adj → di or della rifrazione
refractive constant → indice m di rifrazione costante

Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

refractive

adj refractivo

Mentioned in

References in periodicals archive

Director of marketing and national accounts at CooperVision, Mark Draper, said: "The advanced lens design utilises innovative ActivControl technology to control both axial elongation and myopia progression, whilst fully correcting refractive error."

Slow progression

Globally, approximately 19 million children are estimated to be visually impaired and 12 million of these are due to refractive error alone.

Your Child's Eyes Belong To Him Forever - Give Him The Right Start And He'll Never Be Out Of Sight

Patients are frequently referred to ophthalmology department from pediatric care units for evaluation of refractive error in case of headache.

Ametropia in children with headache

The primary endpoint of the study is the change in refractive error from baseline through 36 months.

Eyenovia enrolls first patient in Phase 3 CHAPERONE study

[USPRwire, Mon Mar 25 2019] Adroit Market Research launched a study titled, "Global Ophthalmology Devices Market Size by Type (Cataract Devices -- Intraocular Lens (IOL) and Phacoemulsification; Refractive Error Devices -- Contact Lens and Excimer Lens & Other Devices), By Region (North America, Europe, Asia Pacific, South America, Middle-East & Africa and Forecast 2018 to 2025".

Ophthalmology Devices Market Size by Product, Demand, Application, End-User, Business Growth and Reg

X VA measurement, for correction of refractive error, should be performed in persons with diabetes who have

Visual acuity assessment in diabetes

Delay in diagnosis and correction of refractive error through glasses at early stage can cause complications.

Healthy lifestyle to protect child vision

While in India, both Dr Hajri and Dr Faisal Naqadan, from HMC's Ophthalmology Department, visited the Refractive Error Among Children programme.

Qatar Creating Vision conducts over 3.6 mn eye screenings

(7,8,9,10,11,12,13,14) Possible associations between AMD and ocular factors such as light iris color, history of previous cataract surgery, short axial length, and hypermetropic refractive error have also been proposed.

Evaluation of the Relationship Between Age-related Macular Degeneration and Refractive Error, Socio-demographic Features, and Biochemical Variables in a Turkish Population

Using a mendelian randomisation study, the researchers looked at 67 798 men and women from England, Scotland and Wales with the UK Biobank cohort, for whom information on years of completed education and refractive error was available.

Years of education linked to risk of myopia

Eye 7 hospitals almost exclusively use the EVO Visian ICL, manufactured by STAAR Surgical, Switzerland, which is customized to the unique refractive error of the patient and can also correct astigmatism.

EvoVisian ICL for correction of spectacle power