Spherical Aberration
Population spherical aberration: associations with ametropia, age, corneal curvature, and image quality
... spherical aberration. The lack of correlation between ametropia and spherical aberration of the eye, with a trend instead for moderate positive correlation with steepness of corneal curvature, ...
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The Effect of instrumental spherical aberration on visual image quality
... instrumental MTF, describing the pupil spherical aberration with The called observed results show MTFa, is aberrations of the eye are defined integral of the the best candidate among ima[r] ...
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Methanol immersion reduces spherical aberration of water dipping lenses at long wavelengths used in multi-photon laser scanning microscopy
... The six-fold fluorescence signal increase using MI compared to WI improves on previously reported adaptive optical methods of spherical aberration correction within biological tissue: Debarre et al. ...
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The eyes of suckermouth armoured catfish (Loricariidae, subfamily Hypostomus): pupil response, lenticular longitudinal spherical aberration and retinal topography
... longitudinal spherical aberration within the lens are minimised, as the cornea is the major refractive surface and the pupil can constrict to limit passage of light to only part of the ...longitudinal ...
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The eyes of suckermouth armoured catfish (Loricariidae, subfamily Hypostomus): pupil response, lenticular longitudinal spherical aberration and retinal topography
... longitudinal spherical aberration within the lens are minimised, as the cornea is the major refractive surface and the pupil can constrict to limit passage of light to only part of the ...longitudinal ...
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Title: The Effect of Different Values of Focus Error and Spherical Aberration on the Intensity of Sharp Edge Image
... with circular aperture and sharp edge. The aberrations effects on the efficiency of the resulting image. The two figures (3) , (5) shows that the effect of fifth order spherical aberration is less than the ...
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The effect of spherical aberration on visual performance and refractive state for stimuli and tasks typical of night viewing
... Figure 3 Difference in refractive error between paraxial refraction and the four different refractive criteria as a function of Seidel SA for a 7-mm pupil. The top panel shows refractions averaged ( ± 2 SEM) over the 3 ...
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Effects of relative negative spherical aberration in single vision contact lens visual performance
... symmetric, spherical contact lenses have been considered for SA correction because of their distinct advantage of maintaining alignment with the optical axis with eye ...
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Treatment of moderate-to-high hyperopia with the WaveLight Allegretto 400 and EX500 excimer laser systems
... induced spherical aberration after conven- tional (LADAR4000 excimer laser [Alcon, Fort Worth, TX, USA]; n = 25) and wavefront-optimized LASIK (WaveLight Allegretto excimer laser; n = 26) for the treatment ...
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Retrospective analysis of changes in the anterior corneal surface after Q value guided LASIK and LASEK in high myopic astigmatism for 3 years
... astigmatism, spherical aberration and coma for high myopia astigmatism treat- ...corneal spherical aberra- tion was greater following LASEK than LASIK and the anterior corneal astigmatism was greater ...
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Evaluation of actual retinal images produced by misaligned aspheric intraocular lenses in a model eye
... of spherical aberration were - 0.27 µ m for IOL B (corneal aberration fully corrected on average), - ...eye aberration similar to that found in young subjects ...(IOL spherical ...
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Simulation Studying Effects of Multiple Primary Aberrations on Donut shaped Gaussian Beam
... and spherical aberration is insensitive to this kind of STED system, the effect of spherical aberration is ...the aberration of depletion patterns in real ...
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Comparative study of wave-front aberration and corneal Asphericity after SMILE and LASEK for myopia: a short and long term study
... To have an 80% chance of detecting a 0.2 μm difference between SMILE and LASEK with 0.25 μm standard devi- ation (SD) in spherical aberration at the p = 0.05 level (two- sided), 24 cases were required. ...
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Design of a 16 5 Megapixel Camera Lens for a Mobile Phone
... Step 1 1) Using operand EFFL to define the effective focal length of the lens, using operand TOTR to confine the total optical length of the lens system, using operand RAID to confine the CRA, using operand REAY to de- ...
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Induced Higher-order aberrations after Laser In Situ Keratomileusis (LASIK) Performed with Wavefront-Guided IntraLase Femtosecond Laser in moderate to high Astigmatism
... the spherical- like aberrations were significantly altered, postoperatively and the induced amount was increased as the degree of myopia increased ...induced spherical aberration ...
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Softec HD hydrophilic acrylic intraocular lens: biocompatibility and precision
... with spherical surfaces exhibits positive spherical ...usually, spherical IOLs add positive spherical aberration to the already positive corneal spherical ...negative ...
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Nano-jet related to Bessel beams and to super-resolutions in microsphere optical experiments
... The main issue of the present paper is show how to avoid diffraction effects in microsphere optical experiments. We describe a combination of a microsphere with an orifice of subwavelength dimensions in the focal plane ...
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AP Physics - Chp 25 - Optical Instruments.pdf
... Spherical aberration: rays far from the lens axis do not focus at the focal point... 12[r] ...
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Original Article Comparison of different femtosecond laser refractive surgeries on higher-order aberrations
... in spherical aberration were most significant, which advised surgeons that the combination of LASIK with Q value-guided or aberration- guided excimer laser cutting process was a good choice to reduce ...
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Early evolution of multifocal optics for well focused colour vision in vertebrates
... Fig.·3. Retinoscopic photographs (A,B) and comparisons of longitudinal spherical aberration (LSA) curves with schlieren photographs for individual lamprey lenses (C–F). (C) Comparisons between the LSA curve ...
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