Title
Retinal straylight as a function of age and ocular biometry in healthy eyes Retinal straylight as a function of age and ocular biometry in healthy eyes
Author
Faculty/Department
Faculty of Medicine and Health Sciences
Publication type
article
Publication
St. Louis, Mo. ,
Subject
Human medicine
Source (journal)
Investigative ophthalmology and visual science. - St. Louis, Mo.
Volume/pages
51(2010) :5 , p. 2795-2799
ISSN
0146-0404
ISI
000277180500065
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Purpose. To determine the dependency of straylight on ocular biometry. Methods. This prospective study included 518 eyes of 277 volunteers of diverse ethnic backgrounds with healthy eyes of various iris colors. The eyes had retinal straylight tested using a commercial psychophysical device. Ocular axial length and refraction were also measured with an ocular biometer and an autorefractometer, respectively. Results. The measured retinal straylight was validated by comparing data with the age model described in the literature as log(s) = P1 + log[1 + (age/65)4], where P1 is the logarithm of the average straylight for the eyes of a newborn. The data agreed well with this model, although P1 was slightly higher (0.931 vs. 0.87). When this model was subtracted from the measured straylight values, a quadratic increase was found in the function of axial length, L: log(s) = 0.931 + log[1 + (age/65)4] + (0.01089L2 0.4820L + 5.330). A similar model was defined for the spherical equivalent refraction SE. This corresponds to an increasing amount of straylight for increasing degrees of myopia. No correlation was found with keratometry and corneal astigmatism or with iris color. Conclusions. Retinal straylight increases not only with age, but also with axial length. Further study is needed to identify the cause of this dependency.
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