Journal ArticleDOI
Odd aberrations and double-pass measurements of retinal image quality
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TLDR
It is theoretically and empirically shown that the double pass through the eye's optics forces the light distribution in the aerial image to be an even-symmetric function even if the single-pass point-spread function is asymmetric as a result of odd aberrations in the eye.Abstract:
We investigated the formation of the aerial image in the double-pass method to measure the optical quality of the human eye. We show theoretically and empirically that the double pass through the eye’s optics forces the light distribution in the aerial image to be an even-symmetric function even if the single-pass point-spread function is asymmetric as a result of odd aberrations in the eye. The reason for this is that the doublepass imaging process is described by the autocorrelation rather than the autoconvolution of the single-pass point-spread functions, as has been previously assumed. This implies that although the modulation transfer function can be computed from the double-pass aerial image, the phase transfer function cannot. We also show that the lateral chromatic aberration of the eye cannot be measured with the double-pass procedure because it is canceled by the second pass through the eye’s optics.read more
Citations
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Journal ArticleDOI
Aberrations and retinal image quality of the normal human eye.
Junzhong Liang,David R. Williams +1 more
TL;DR: A wave-front sensor is constructed to measure the irregular as well as the classical aberrations of the eye, providing a more complete description of the Eye, indicating that they are not random defects.
Journal ArticleDOI
Adaptive optics via pupil segmentation for high-resolution imaging in biological tissues
TL;DR: An approach to adaptive optics in microscopy wherein the rear pupil of an objective lens is segmented into subregions, and light is directed individually to each subregion to measure, by image shift, the deflection faced by each group of rays as they emerge from the objective and travel through the specimen toward the focus.
Journal ArticleDOI
Adaptive optics in microscopy
TL;DR: In this article, the sources of aberrations, their effects and their correction with adaptive optics, particularly in confocal and two-photon microscopes, are discussed. And applications of adaptive optics in the related areas of optical data storage, optical tweezers and micro/nanofabrication are also reviewed.
Journal ArticleDOI
Analysis of the performance of the Hartmann–Shack sensor in the human eye
TL;DR: An analysis of the accuracy and limitations of the sensor using experimental results and computer simulations and compared the ocular modulation transfer function obtained from simultaneously recorded double-pass and Hartmann-Shack images.
Journal ArticleDOI
Effect of rotation and translation on the expected benefit of an ideal method to correct the eye’s higher-order aberrations
TL;DR: The results in a keratoconic subject showed that important benefits are obtained despite decentrations in highly aberrated eyes, and provided practical rules to implement a selective correction depending on the amount of decentration.
References
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TL;DR: It is shown that with this method, using a Hartmann-Shack wave-front sensor, one can obtain a fast, precise, and objective measurement of the aberrations of the eye.
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F. W. Campbell,R. W. Gubisch +1 more
TL;DR: Optical quality of the eye was measured at eight pupil sizes between 1·5 and 6·6 mm diameter by recording the faint light emerging from the eye; this light was reflected from the bright image of a thin line on the fundus.
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Aberrations and retinal image quality of the normal human eye.
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