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aberration
aberration
The Oxford Pocket Dictionary of Current English
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2009
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© The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information)
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ab·er·ra·tion
/ ˌabəˈrāshən/
•
n.
a departure from what is normal, usual, or expected, typically one that is unwelcome.
∎
a person whose beliefs or behavior are unusual or unacceptable.
∎
a departure from someone's usual moral character or mental ability, typically for the worse.
∎
Biol.
a characteristic that deviates from the normal type:
color aberrations.
∎
Optics
the failure of rays to converge at one focus because of limitations or defects in a lens or mirror.
∎
Astron.
the apparent displacement of a celestial object from its true position, caused by the relative motion of the observer and the object.
DERIVATIVES:
ab·er·ra·tion·al
/ -shənl/ adj.
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Aberration-free IOL offers superior optical performance
Magazine article from: Ophthalmology Times; 10/15/2004; ; 700+ words
; ...decentered by 0.5 to 1 mm, the aberration-free lens outperformed the modified...views because non-axisymmetrical aberrations, such as coma and astigmatism...no splaying of the curve with an aberration-free IOL because it is immune...
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Negative spherical aberration after CK is desirable
Magazine article from: Ophthalmology Times; 10/1/2004; ; 700+ words
; ...Greater degree of negative spherical aberration seen with great number of spots applied San Diego-Inducing negative spherical aberration may be desirable after conductive keratoplasty...that patients with negative spherical aberration after CK met the target refractive error...
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New aspheric IOL designed to avoid inducing aberrations
Magazine article from: Ophthalmology Times; 1/1/2006; ; 700+ words
; ...spherical aberrations rather than...spherical aberration of the cornea...internal aberrations, the investigators...spherical aberration, the AO...spherical aberration Z4 (4...internal aberrations were high...
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Clonal and non-clonal chromosome aberrations and genome variation and aberration.(MINIREVIEW / MINISYNTHESE)(genomics research)(Abstract also in French)
Magazine article from: Genome; 3/1/2006; ; 700+ words
; ...experimental data. Genetic aberration at the chromosome level...key aspect of genome aberration and the systematic definition of chromosomal aberrations with their impact on...evolution, genome aberration and variation. Resume...seraient causes par des aberrations genomiques plutot que...
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The nature of chromosomal aberrations detected in humans exposed to benzene
Magazine article from: Critical Reviews in Toxicology; 1/1/2002; ; 700+ words
; KEY WORDS: benzene, chromosomal aberrations, cytogenetics, FISH, human, leukemia...lymphocytic leukemia; CA: chromosomal aberrations; CML: chronic myeloid leukemia; CS: stable chromosomal aberrations; C.: unstable chromosomal aberrations...
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New method for presenting ocular aberrations more user-friendly
Magazine article from: Ophthalmology Times; 11/1/2002; ; 700+ words
; ...higher-order aberration, to illustrate...different aberrations can have different...describing aberrations, noted that...spherical aberration represent...of only one aberration in isolation...Clinically, aberrations can exist...
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Aspheric IOL designed with goal of aberration-free or neutral lens
Magazine article from: Ophthalmology Times; 8/15/2004; ; 700+ words
; ...has no spherical aberration and will therefore...existing higher-order aberrations. Louis D. "Skip...add further spherical aberration to the ocular system...1OL has no spherical aberration and will therefore...existing higher-order aberrations.
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Wavefront-guided ablations reduce spherical aberrations
Magazine article from: Ophthalmology Times; 10/15/2002; ; 700+ words
; ...higher-order aberrations. "Work published...increased spherical aberration five- to 10...the spherical aberrations are typically...Spherical aberrations reduced "In...induced spherical aberration to a slight...
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Japanese Inventors Develop Spherical Aberration Correction Controlling Device
News Wire article from: US Fed News Service, Including US State News; 7/7/2007; 560 words
; ...Japan, have developed a spherical aberration correction control device and an optical...invention relates to a "spherical aberration correction control device for controlling a spherical aberration correction section for correcting a...
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Improving Functional Vision Through Elimination of Spherical Aberration
Magazine article from: Ophthalmology Times; 4/1/2004; ; 700+ words
; ...spherical aberration to reduce total ocular aberrations.10 More...total ocular aberrations are actually...the corneal aberration because of...spherical aberration, the modified...total ocular aberrations, thereby...
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aberration
Book article from: The Columbia Encyclopedia, Sixth Edition
aberration in optics, condition that causes a...lenses or mirrors. Of the many types of aberration, the two most significant to the lens...spherical and chromatic. Spherical aberration is caused by the failure of a lens or...
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Chromosomal Aberrations
Book article from: Genetics
Chromosomal Aberrations Chromosomal aberrations are abnormalities in the structure or number of chromosomes...it possible to recognize that structural abnormalities or aberrations were associated with specific genetic syndromes. Chromosome...
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aberration of starlight
Book article from: A Dictionary of Astronomy
aberration of starlight The small apparent difference...observer's speed and direction of motion. Aberration of starlight resulting from the Earth's orbital motion is termed annual aberration ; the much smaller effect resulting from...
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spherical aberration
Book article from: A Dictionary of Astronomy
spherical aberration A defect of mirrors and lenses in which...those close to the axis. Spherical aberration is seen in the images formed by spheroidal...star image suffering from spherical aberration has no unique focus but instead has...
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chromatic aberration
Book article from: A Dictionary of Astronomy
chromatic aberration False colour in a refracting optical system...focal ratio of a lens, the less chromatic aberration it will show. Early telescopes were made...achromatic lens was invented to overcome chromatic aberration.
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