QUT ePrints

Effect of third-order aberrations on dynamic accommodation

López-Gil, Norberto, Rucker, Frances J., Stark, Lawrence R., Badar, Mustanser, Borgovan, Theodore, Burke, Sean, & Kruger, Philip B. (2007) Effect of third-order aberrations on dynamic accommodation. Vision Research, 47(6), pp. 755-765.

View at publisher

Abstract

We investigate the potential for the third-order aberrations coma and trefoil to provide a signed cue to accommodation. It is first demonstrated theoretically (with some assumptions) that the point spread function is insensitive to the sign of spherical defocus in the presence of odd-order aberrations. In an experimental investigation, the accommodation response to a sinusoidal change in vergence (1–3 D, 0.2 Hz) of a monochromatic stimulus was obtained with a dynamic infrared optometer. Measurements were obtained in 10 young visually normal individuals with and without custom contact lenses that induced low and high values of r.m.s. trefoil (0.25, 1.03 μm) and coma (0.34, 0.94 μm). Despite variation between subjects, we did not find any statistically significant increase or decrease in the accommodative gain for low levels of trefoil and coma, although effects approached or reached significance for the high levels of trefoil and coma. Theoretical and experimental results indicate that the presence of Zernike third-order aberrations on the eye does not seem to play a crucial role in the dynamics of the accommodation response.

Impact and interest:

16 citations in Scopus
Search Google Scholar™
14 citations in Web of Science®

Citation countsare sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 26060
Item Type: Journal Article
Additional URLs:
Keywords: Contact Lens, Accommodation, Monochromatic Aberrations
DOI: 10.1016/j.visres.2006.08.010
ISSN: 0042-6989
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Schools > School of Optometry & Vision Science
Deposited On: 01 Jul 2009 10:36
Last Modified: 11 Aug 2011 03:10

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page