Corpus ID: 35061542

How Far Can We Extend the Limits of Human Vision ?

@inproceedings{Williams2003HowFC,
  title={How Far Can We Extend the Limits of Human Vision ?},
  author={David R. Williams and Jason Porter and Geunyoung Yoon and Antonio Guirao and Heidi J Hofer and Li Chen and Ian G. Cox and Scott Macrae},
  year={2003}
}
Methods to correct the optics of the human eye are at least 700 years old. Spectacles have been used to correct defocus at least as early as the 13th century1,2 and to correct astigmatism since the 19th century.3 Though it is well established that the eye suffers from many more monochromatic aberrations than defocus and astigmatism, aberrations we will refer to as higher-order aberrations, there has been relatively little work on correcting them until recently. In 1961, Smirnov, an early… Expand
Visual performance after correcting the monochromatic and chromatic aberrations of the eye.
  • G. Yoon, D. Williams
  • Physics, Medicine
  • Journal of the Optical Society of America. A, Optics, image science, and vision
  • 2002
TLDR
Improvements in contrast sensitivity and visual acuity are demonstrated in white light and in monochromatic light when adaptive optics corrects the eye's higher-order monochromaatic aberrations. Expand
Wavefront guided ablation.
TLDR
This study was the first to demonstrate that the correction of higher-order aberrations can lead to supernormal visual performance in normal eyes, and spurred a ground swell of interest in wavefront sensing and the possibility of coupling it with wavefront correction in the form of customized corneal ablation. Expand
Optische und physiologische Grenzen der wellenfront- gesteuerten Hornhautchirurgie
Abstract According to optical diffraction theory,a visual acuity of 20/3.5 is possible in human eyeswith pupil diameters larger than 6 mm. This theoretical value cannot be obtained inpractice – inExpand
Can uncompensated higher order aberration profile, or aberropia be responsible for subnormal best corrected vision and pseudo-amblyopia.
TLDR
It is hypothesized that abnormally increased and uncompensated higher order aberration profile in certain cases may limit the amount of best corrected visual acuity to subnormal levels and produce a pseudo-ambylopia like picture. Expand
Recent advances in measurement of monochromatic aberrations of human eyes
  • D. Atchison
  • Physics, Medicine
  • Clinical & experimental optometry
  • 2005
TLDR
Methods used to measure aberrations, the magnitude of aberrATIONS in general populations and how these are affected by various factors (for example, age, refractive error, accommodation and refractive surgery) are considered and how aberrings and their correction affect spatial visual performance are considered. Expand
A population study on changes in wave aberrations with accommodation.
TLDR
A typical eye will benefit over the entire accommodative range (0-6 D) if aberrations are corrected for distance viewing, even at high accommodative levels. Expand
Adaptive optics simulation of intraocular lenses with modified spherical aberration.
TLDR
Correcting ocular spherical aberration improves spatial vision in the best-focus position without compromising the subjective tolerance to defocus. Expand
Effect of beam size on the expected benefit of customized laser refractive surgery.
TLDR
A top-hat laser beam of 1 mm (Gaussian with FWHM of 0.76 mm) is small enough to produce a customized ablation for typical human eyes, as well as defocus and astigmatism, while large diameter laser beams decrease the ability to correct higher order aberrations. Expand
Changes of higher‐order aberrations with the use of various mydriatics
  • Jae-hyung Kim, T. Lim, Myoung Joon Kim, H. Tchah
  • Mathematics, Medicine
  • Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians
  • 2009
TLDR
It is suggested that mydriatics may affect higher‐order aberrations, especially spherical aberration, and this should be considered when performing wavefront analysis and when correcting wavefront errors. Expand
Wavefront-Guided Scleral Lens Prosthetic Device for Keratoconus
TLDR
The customized SLPD with wavefront-guided optics corrected the HOA of advanced KC patients to normal levels and improved their vision significantly and the residual aberration was comparable to that of normal eyes. Expand
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References

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TLDR
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. Expand
Calculated impact of higher-order monochromatic aberrations on retinal image quality in a population of human eyes.
TLDR
The impact of higher-order aberrations on retinal image quality and the magnitude of the visual benefit expected from their correction in a large population of human eyes are calculated and theoretical benefits could be realized in normal viewing conditions but only under specific conditions. Expand
Effect of rotation and translation on the expected benefit of an ideal method to correct the eye's higher-order aberrations.
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TLDR
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. Expand
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TLDR
This work used a modified Hartmann-Shack wave-front sensor to measure the monochromatic wave aberration of both eyes for 109 normal human subjects and found that most Zernike modes are relatively uncorrelated with each other across the population. Expand
A subjective method for the measurement of monochromatic aberrations of the eye.
TLDR
The optical MTF of the authors' subjects’ eyes is computed and it is found that the role of aberrations in degrading the MTF may be greater than generally believed. Expand
Objective technique for the determination of monochromatic aberrations of the human eye.
TLDR
Preliminary results on 11 subjects confirm earlier findings that comalike, third-order aberrations are more important than spherical or other fourth-orderAberrations in degrading the retinal image and for the average subject, the diffraction-limited pupil size is approximately 3 mm. Expand
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New measurements of a large population of human eyes are described and the increase in contrast sensitivity when higher order aberrations are corrected with an adaptive optics system suggests that many, though not all, observers with normal vision would receive worthwhile improvements in spatial vision from customized vision correction, at least over a range of viewing distances and particularly when the pupils are large. Expand
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TLDR
An improved version of the well-known interference fringe technique which theoretically allows a sinusoidal pattern of very high contrast to be formed directly on the retina to be obtained without prior modification by the optics of the eye is reported. Expand
Statistical variation of aberration structure and image quality in a normal population of healthy eyes.
TLDR
It is inferred that subjective best focus occurs when the area of the central, aberration-free region of the pupil is maximized, and that correction of the 12 largest principal components, or 14 largest Zernike modes, would be required to achieve diffraction-limited performance on average for a 6-mm pupil. Expand
Theory and measurement of ocular chromatic aberration
TLDR
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. Expand
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