Journal ArticleDOI
The chromatic eye: a new reduced-eye model of ocular chromatic aberration in humans
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TLDR
The reduced eye was further modified by changing the refracting surface to an aspherical shape to reduce the amount of spherical aberration, providing an improved account of both the longitudinal and transverse forms of ocular chromatic aberration.Abstract:
New measurements of the chromatic difference of focus of the human eye were obtained with a two-color, vernier-alignment technique. The results were used to redefine the variation of refractive index of the reduced eye over the visible spectrum. The reduced eye was further modified by changing the refracting surface to an aspherical shape to reduce the amount of spherical aberration. The resulting chromatic-eye model provides an improved account of both the longitudinal and transverse forms of ocular chromatic aberration.read more
Citations
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Journal ArticleDOI
Experimental validation of a Bayesian model of visual acuity.
TL;DR: Measurements of visual acuity for 10 subjects in the presence of natural ocular aberrations and different degrees of induced defocus are compared with the predictions given by a Bayesian model customized with aberrometric data of the eye.
Journal ArticleDOI
Differences of Longitudinal Chromatic Aberration (LCA) between Eyes with Intraocular Lenses from Different Manufacturers.
Masashi Nakajima,Takahiro Hiraoka,Toshiya Yamamoto,Seiu Takagi,Yoko Hirohara,Tetsuro Oshika,Toshifumi Mihashi +6 more
TL;DR: It is concluded that the differences between the LCA of different manufacturers do not affect visual performances when some extent of higher-order aberration (HOA) exists, and the smaller HOA of AMO IOLs may enhance visual performance.
Patent
Method and apparatus for imaging in an eye
TL;DR: In this paper, a method for in vivo imaging of at least one cell including: first obtaining a first image of the cell, second obtaining a second image of that cell, adjusting at least a part of the first image and the second image to account for a movement of the at least cell, generating a final image based at least in part on the adjusting.
Proceedings ArticleDOI
Optimal defocus estimates from individual images for autofocusing a digital camera
Johannes Burge,Wilson S. Geisler +1 more
TL;DR: It is shown that there are sufficient residual chromatic aberrations in a high-quality prime lens for the method to achieve good performance, and the proposed approach could be used to develop improved autofocus algorithms for digital imaging and video systems.
Journal ArticleDOI
Normative best-corrected values of the visual image quality metric VSX as a function of age and pupil size
TL;DR: These objectively determined benchmarks represent the best theoretical levels of visual image quality achievable with a sphere, cylinder, and axis correction in normal eyes and can be used to evaluate both traditional and wavefront-guided optical corrections provided by refractive surgery, contact lenses, and spectacles.
References
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Journal ArticleDOI
The Frequency Response of a Defocused Optical System
TL;DR: In this paper, the response of a defocused aberration-free optical system to line-frequencies in the object is studied analytically, and curves are given showing the response as a function of line-frequency for a range of values of defect of focus.
Journal ArticleDOI
Saccadic eye movements towards stimuli triggered by prior saccades.
P.E. Hallett,A.D. Lightstone +1 more
TL;DR: The only finding reminiscent of perceptual “saccadic suppression” and mislocation effects is that a target which steps to a position ahead of a saccade is sometimes ignored.
Journal ArticleDOI
Theory and measurement of ocular chromatic aberration.
TL;DR: One implication of these results is that, although the eye has substantial chromatic aberration, the pupil is positioned so as to minimize the transverse component of the aberration for central vision, thereby optimizing foveal image quality for polychromatic objects.
Journal ArticleDOI
The change in refractive power of the human eye in dim and bright light.
George Wald,Donald R. Griffin +1 more
TL;DR: It is concluded that setting optical instruments about 0.4 diopter more negatively in dim than in bright light is justified on the basis of the chromatic aberration of the eye.