Open AccessJournal Article
The optical quality of the monochromatic retinal image as a function of focus.
Charman Wn,Jennings Ja +1 more
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TLDR
In this article, changes in retinal image quality with focus for an aberration-free eye with a 5-mm pupil are discussed in terms of both geometrical and physical optics.Abstract:
Changes in retinal image quality with focus for an aberration-free eye with a 5-mm pupil are discussed in terms of both geometrical and physical optics. Further modulation transfer function curves illustrate the effect of spherical aberration. These theoretical results are compared with analogous experimental data obtained at different wavelengths with quasi-monochromatic illumination, using a double-pass photo-electric, scanning instrument. The comparison shows that the approximations of geometrical optics predict ocular performance quite well, provided that the errors of focus are reasonably large (greater than or equal to 0.5 DS for a 5-mm entrance pupil). Possible sources of error in the experimental measurements are indicated.read more
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Accuracy and precision of objective refraction from wavefront aberrations
TL;DR: It is concluded that objective methods of refraction based on wavefront aberration maps can accurately predict the results of subjective refraction and may be more precise and wavefront methods may become the new gold standard for specifying conventional and/or optimal corrections of refractive errors.
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Pupil location under mesopic, photopic, and pharmacologically dilated conditions.
TL;DR: Changes in the location of the pupil center with changes in the dilation of the pupils are typically slight, but can be significant in a few subjects, especially in pharmacologically dilated pupils.
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Modulation transfer of the human eye as a function of retinal eccentricity
TL;DR: In this paper, the authors measured the monochromatic image quality of the eye across a wide visual field (120°), with natural pupil (4 mm) and accommodation (3 diopters).
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The depth-of-field of the human eye from objective and subjective measurements.
TL;DR: Objective and subjective measurements of DOF are only slightly affected by pupil size, wavelength and spectral composition, which allows us to evaluate the role of ocular aberrations and Stiles-Crawford effect.
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Depth-of-focus of the human eye: theory and clinical implications.
Bin Wang,Kenneth J. Ciuffreda +1 more
TL;DR: A review of the current understanding of the depth-of-focus should prove to be useful to clinicians, researchers, and students as an introduction to the subject.