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Optical aberrations, retinal image q...

University of California, Berkeley.

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Optical aberrations, retinal image quality and eye growth: Experimentation and modeling.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Optical aberrations, retinal image quality and eye growth: Experimentation and modeling./
Author:	Tian, Yibin.
Description:	156 p.
Notes:	Adviser: Christine F. Wildsoet.
Contained By:	Dissertation Abstracts International68-08B.
Subject:	Engineering, Biomedical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3275625
ISBN:	9780549172048

Optical aberrations, retinal image quality and eye growth: Experimentation and modeling.
Tian, Yibin.

Optical aberrations, retinal image quality and eye growth: Experimentation and modeling. - 156 p.

Adviser: Christine F. Wildsoet.

Thesis (Ph.D.)--University of California, Berkeley, 2007.

Retinal image quality is important for normal eye growth. Optical aberrations are of interest for two reasons: first, they degrade retinal images; second, they might provide some cues to defocus. Higher than normal ocular aberrations have been previously associated with human myopia. However, these studies were cross-sectional in design, and only reported aberrations in terms of root mean square (RMS) errors of Zernike coefficients, a poor metric of optical quality.

ISBN: 9780549172048Subjects--Topical Terms:

1017684
Engineering, Biomedical.

Optical aberrations, retinal image quality and eye growth: Experimentation and modeling.
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020 $a 9780549172048
035 $a (UMI)AAI3275625
035 $a AAI3275625
040 $a UMI $c UMI
100 1 $a Tian, Yibin. $3 1057819
245 1 0 $a Optical aberrations, retinal image quality and eye growth: Experimentation and modeling.
300 $a 156 p.
500 $a Adviser: Christine F. Wildsoet.
500 $a Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5155.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2007.
520 $a Retinal image quality is important for normal eye growth. Optical aberrations are of interest for two reasons: first, they degrade retinal images; second, they might provide some cues to defocus. Higher than normal ocular aberrations have been previously associated with human myopia. However, these studies were cross-sectional in design, and only reported aberrations in terms of root mean square (RMS) errors of Zernike coefficients, a poor metric of optical quality.
520 $a This dissertation presents results from investigations of ocular optical aberrations, retinal image quality and eye growth in chicks and humans. A number of techniques were utilized, including Shack-Hartmann aberrometry, high-frequency A-scan ultrasonography, ciliary nerve section (CNX), photorefractive keratectomy (PRK) as well as computer simulations and modeling. A technique to extract light scatter information from Shack-Hartmann images was also developed. The main findings of the dissertation are summarized below.
520 $a In young chicks, most ocular aberrations decreased with growth in both normal and CNX eyes, and there were diurnal fluctuations in some aberrations. Modeling suggested active reduction in higher order aberrations (HOAs) during early development. Although CNX eyes manifested greater than normal HOAs, they showed near normal growth.
520 $a Retinal image degradation varied greatly among individual eyes post-PRK in young chicks. Including light scatter information into analyses of retinal image quality better estimated the latter. Albino eyes showed more severe retinal image degradation than normal eyes, due to increased optical aberrations and light scatter, but their growth was similar to those of normal eyes, implying that they are relatively insensitive to retina image quality.
520 $a Although the above results questioned the influence of optical aberrations on early ocular growth, some optical quality metrics, derived from optical aberrations data, could predict how much the eyes of young chicks subsequently elongated. The performance of some focus measures was very poor when non-defocus aberrations exceeded a certain level; presumably, these non-defocus aberrations might interfere with the eye's ability to interpret defocus.
520 $a In anisomyopic human adults, more myopic eyes had larger anterior and vitreous chambers, greater astigmatism, and more positive spherical aberration. However, compared to isometropes, only interocular differences in spherical equivalent refractive errors were significantly increased.
590 $a School code: 0028.
650 4 $a Engineering, Biomedical. $3 1017684
650 4 $a Health Sciences, Ophthalmology. $3 1019445
650 4 $a Physics, Optics. $3 1018756
690 $a 0381
690 $a 0541
690 $a 0752
710 2 $a University of California, Berkeley. $3 687832
773 0 $t Dissertation Abstracts International $g 68-08B.
790 $a 0028
790 1 0 $a Wildsoet, Christine F., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3275625