Results 251 to 260 of about 9,035 (308)
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Calculation of the geometrical point‐spread function from wavefront aberrations
Ophthalmic & physiological optics, 2019This report uses the principles of geometrical optics to compute the optical point‐spread function (PSF) from the wavefront error function.
L. Thibos
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Journal of Modern Optics, 1992
Abstract In this paper we obtain equations for the two aperture second derivatives of the wavefront aberration function in terms of the position of the local sagittal and tangential foci. The derivatives presented here are valid for meridional rays.
Silvia A. Comastri, J.M. Simon
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Abstract In this paper we obtain equations for the two aperture second derivatives of the wavefront aberration function in terms of the position of the local sagittal and tangential foci. The derivatives presented here are valid for meridional rays.
Silvia A. Comastri, J.M. Simon
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Aberrations measurement of freeform spectacle lenses based on Hartmann wavefront technology
Applied Optics, 2015Jing Yu, Fengzhou Fang, Zhongjun Qiu
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Wavefront Aberration of the Eye
Optometry and Vision Science, 1991ABSTRACT The concept of monochromatic wavefront aberration is discussed in relation to ray aberration, and methods for its measurement in the case of the eye are described. Examples are given of the measured aberration in individual eyes: in general the aberration falls within the Rayleigh quarter‐wavelength criterion for pupil ...
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Journal of cataract and refractive surgery, 2018
PURPOSE To evaluate the changes in corneal higher-order aberrations (HOAs) after corneal wavefront-guided transepithelial photorefractive keratectomy (PRK) and small-incision lenticule extraction (SMILE).
Hun Lee +6 more
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PURPOSE To evaluate the changes in corneal higher-order aberrations (HOAs) after corneal wavefront-guided transepithelial photorefractive keratectomy (PRK) and small-incision lenticule extraction (SMILE).
Hun Lee +6 more
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A Scanning Interferometer for Wavefront Aberration Measurements
Applied Optics, 1969The fundamental Principles of Operation and of the design of a new type of lateral shearing interferometer are described. This instrument has the advantage over existing devices that no computation is required in order to derive the wavefront shape from the interferogram.
A, Ashton, A C, Marchant
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Wavefront aberrations in eyes with decentered ablations
Journal of Cataract and Refractive Surgery, 2009To compare the refractive and functional outcomes and wavefront profiles in eyes with decentered ablations and eyes with well-centered ablations.Medical Research Foundation, Chennai, Tamil Nadu, India.This retrospective analysis comprised eyes with topographically diagnosed decentered ablations after laser in situ keratomileusis (LASIK).
Prema, Padmanabhan +3 more
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Wavefront aberrations and their clinical application
Clinical and Experimental Optometry, 2009In only about 10-years, the measurement of wavefront aberrations of the human eye has gone from being confined to the laboratories of a few researchers to routine testing in some settings such as r...
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Wavefront Aberration and Wavefront Shape
2016The study of optical systems may be considered from two different perspectives, namely systems analysis and systems design, respectively.
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