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aberration
aberration
aberration In astronomy, apparent slight change of position of a star due to the effect of the Earth's orbital motion and the finite velocity of light. A telescope must be inclined by an angle of up to 20° to compensate for aberration. The effect was first described by James Bradley in 1729 and was used to prove that the Earth orbits the Sun.
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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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Monofocal IOL provides optimal spherical aberration compensation
Magazine article from: Ophthalmology Times; 1/1/2006; ; 700+ words
; ...Correct spherical aberration The problem with traditional...positive spherical aberrations, and three lenses...and it corrects aberrations in both the cornea...43, and it corrects aberrations in the lens only...negative spherical aberration into the human optical...
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Higher-order aberrations vary with pupil, optical zone sizes
Magazine article from: Ophthalmology Times; 7/15/2003; ; 700+ words
; ...higher-order aberration correction because higher-order aberrations increase with...reason, wavefront aberration RMS results should...higher-order aberrations with increasing...higher-order aberration RMS values among...
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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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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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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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Japanese Inventors Develop Spherical Aberration Correction Controlling Device
News Wire article from: US Fed News Service, Including US State News; 7/7/2007; 553 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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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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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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aberration, optical
Book article from: A Dictionary of Astronomy
aberration, optical An imperfection or error in the image produced by a lens, mirror, or optical system. There are six types of aberration: chromatic aberration , spherical aberration , coma (see Coma, Optical ), field...
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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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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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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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