Age-related changes in optical and biometric characteristics of emmetropic eyes
Atchison, David A., Markwell, Emma L., Kasthurirangan, Sanjeev, Pope, James M., Smith, George, & Swann, Peter G. (2008) Age-related changes in optical and biometric characteristics of emmetropic eyes. Journal of Vision, 8(4), pp. 1-20.
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We measured optical and biometric parameters of emmetropic eyes as a function of age. There were approximately 20 subjects each in age groups 18–29, 30–39, 40–49, 50–59, and 60–69 years with similar male and female numbers. One eye was tested for each subject, having spherical equivalent in the range −0.88 D to +0.75 D and ≤0.50 D astigmatism. Despite considerable data scatter, we found significant age changes: anterior chamber depth decreased 0.011 mm/year, lens central thickness increased 0.024 mm/year, anterior segment depth increased 0.013 mm/year, eye length increased 0.011 mm/year, anterior lens radius of curvature decreased 0.044 mm/year, and lens equivalent refractive index decreased 0.0003/year. Males had higher anterior corneal radii of curvature (0.16 mm), lower lens equivalent refractive index (0.006), longer vitreous lengths (0.51 mm), and longer axial lengths (0.62 mm) than females. Superficially, the results suggest that eyes get bigger as they age. However, results can be related to refraction patterns in which refraction is stable in 20s to 40s and then moves in the hypermetropic direction. It is likely that several young subjects will become hypermetropic as they age, and it is possible that some of the older subjects were myopic when younger.
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|Item Type:||Journal Article|
|Additional Information:||The contents of this journal can be freely accessed online via the journal's web page (see hypertext link).|
|Keywords:||ageing, anterior chamber depth, anterior segment length, asphericity, axial length, cornea, emmetropia lens, lens thickness, ocular parameters, radius of curvature, refractive index, vitreous chamber depth|
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Past > Schools > School of Physical & Chemical Sciences
|Copyright Owner:||Copyright 2008 The Association for Research in Vision and Ophthalmology (ARVO)|
|Copyright Statement:||This is the author-version of the work. The final, definitive version of this article has been published in <Atchison, David A. and Markwell, Emma L. and Kasthurirangan, Sanjeev and Pope, James M. and Smith, George and Swann, Peter G. (2008) Age-related changes in optical and biometric characteristics of emmetropic eyes. Journal of Vision, 8(4). pp. 1-20.>, © < The Association for Research in Vision and Ophthalmology (ARVO).|
|Deposited On:||03 Feb 2009 01:34|
|Last Modified:||29 Feb 2012 13:50|
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