The contribution of accommodation and the ocular surface to the microfluctuations of wavefront aberrations of the eye
Zhu, Mingxia, Collins, Michael J., & Iskander, D. Robert (2006) The contribution of accommodation and the ocular surface to the microfluctuations of wavefront aberrations of the eye. Ophthalmic and Physiological Optics, 26(5), pp. 439-446.
We have used videokeratoscopy and wavefront sensing to investigate the contribution of the ocular surface and the effect of stimulus vergence on the microfluctuations of the wavefront aberrations of the eye. The fluctuations of the wavefront aberrations were quantified by their variations around the mean and by using power spectrum analysis. Integrated power was determined in two regions: 0.1–0.7 Hz (low frequencies) and 0.8–1.8 Hz (high frequencies). Changes in the ocular surface topography were measured using high-speed videokeratoscopy and variations in the ocular wavefront aberrations were measured with a wavefront sensor. The microfluctuations of wavefront aberrations of the ocular surface were found to be considerably smaller than the microfluctuations of the wavefront aberrations of the total eye. The fluctuations in defocus while viewing a closer target at 2 or 4 D were found to be significantly greater than fluctuations in defocus when viewing a far target. This increase in defocus fluctuations (p ≤ 0.001) occurred in both the low- and high-frequency regions of the power spectra.
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|Item Type:||Journal Article|
|Additional Information:||For more information, please refer to the journal's website (see hypertext link) or contact the author.|
|Keywords:||accommodation microfluctuations, ocular aberrations, refractive error, stimulus vergence|
|ISSN:||0275-5408 , 1475-1313|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)|
|Divisions:||Current > Research Centres > Centre for Health Research
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
|Copyright Owner:||Copyright 2006 Blackwell Publishing|
|Deposited On:||25 Oct 2007 00:00|
|Last Modified:||29 Feb 2012 13:24|
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