Effects of age on peripheral ocular aberrations
Data(s) |
09/03/2010
|
---|---|
Resumo |
On-axis monochromatic higher-order aberrations increase with age. Few studies have been made of peripheral refraction along the horizontal meridian of older eyes, and none of their off-axis higher-order aberrations. We measured wave aberrations over the central 42°x32° visual field for a 5mm pupil in 10 young and 7 older emmetropes. Patterns of peripheral refraction were similar in the two groups. Coma increased linearly with field angle at a significantly higher rate in older than in young emmetropes (−0.018±0.007 versus −0.006±0.002 µm/deg). Spherical aberration was almost constant over the measured field in both age groups and mean values across the field were significantly higher in older than in young emmetropes (+0.08±0.05 versus +0.02±0.04 µm). Total root-mean-square and higher-order aberrations increased more rapidly with field angle in the older emmetropes. However, the limits to monochromatic peripheral retinal image quality are largely determined by the second-order aberrations, which do not change markedly with age, and under normal conditions the relative importance of the increased higher-order aberrations in older eyes is lessened by the reduction in pupil diameter with age. Therefore it is unlikely that peripheral visual performance deficits observed in normal older individuals are primarily attributable to the increased impact of higher-order aberration. |
Formato |
application/pdf |
Identificador | |
Publicador |
Optical Society of America |
Relação |
http://eprints.qut.edu.au/32144/1/c32144.pdf DOI:10.1364/OE.18.005840 Mathur, Ankit, Atchison, David A., & Charman, William N. (2010) Effects of age on peripheral ocular aberrations. Optics Express, 18(6), pp. 5840-5853. |
Direitos |
Copyright 2010 Optical Society of America This paper was published in [Optics Express] and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-6-5840]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. |
Fonte |
Faculty of Health; Institute of Health and Biomedical Innovation; School of Optometry & Vision Science |
Palavras-Chave | #111399 Optometry and Ophthalmology not elsewhere classified #111302 Optical Technology #111303 Vision Science #aberrations #peripheral aberrations #aging |
Tipo |
Journal Article |