The short-term accommodation response to aniso-accommodative stimuli in isometropia

Vincent, Stephen J., Collins, Michael J., Read, Scott A., Ghosh, Atanu, Chen, Christine, Lam, Anthony, Sahota, Sonya, & Vo, Rebecca (2015) The short-term accommodation response to aniso-accommodative stimuli in isometropia. Ophthalmic and Physiological Optics, 35(5), pp. 552-561.

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Abstract

Purpose

There have been only a limited number of studies examining the accommodative response that occurs when the two eyes are provided with disparate accommodative stimuli, and the results from these studies to date have been equivocal. In this study, we therefore aimed to examine the capacity of the visual system to aniso-accommodate by objectively measuring the interocular difference in the accommodation response between fellow dominant and non-dominant eyes under controlled monocular and binocular viewing conditions during short-term exposure to aniso-accommodative stimuli.

Methods

The accommodative response of each eye of sixteen young isometropic adults (mean age 22 ± 2 years) with normal binocular vision was measured using an open-field autorefractor during a range of testing conditions; monocularly (accommodative demands ranging from 1.32 to 4.55 D) and binocularly while altering the accommodation demand for each eye (aniso-accommodative stimuli ranging from 0.24 to 2.05 D).

Results

Under monocular viewing conditions, the dominant and non-dominant eyes displayed a highly symmetric accommodative response; mean interocular difference in spherical equivalent 0.01 ± 0.06 D (relative) and 0.22 ± 0.06 D (absolute) (p>0.05). During binocular viewing, the dominant eye displayed a greater accommodative response (0.11 ± 0.34 D relative and 0.24 ± 0.26 D absolute) irrespective of whether the demand of the dominant or non-dominant eye was altered (p = 0.01). Astigmatic power vectors J0 and J45 did not vary between eyes or with increasing accommodation demands under monocular or binocular viewing conditions (p>0.05).

Conclusion

The dominant and non-dominant eyes of young isometropic individuals display a similar consensual lag of accommodation under both monocular and binocular viewing conditions, with the dominant eye showing a small but significantly greater (by 0.12 to 0.25 D) accommodative response. Evidence of short-term aniso-accommodation in response to asymmetric accommodation demands was not observed.

Impact and interest:

3 citations in Scopus
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3 citations in Web of Science®

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ID Code: 84937
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Aniso-accommodation, Accommodation, Interocular symmetry, Ocular dominance
DOI: 10.1111/opo.12225
ISSN: 0275-5408
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Copyright Owner: Copyright 2015 The Authors; Ophthalmic & Physiological Optics Copyright 2014 The College of Optometrists
Copyright Statement: This is the peer reviewed version of the following article: Vincent SJ, Collins MJ, Read SA, Ghosh A, Chen C, Lam A, Sahota S & Vo R. The short-term accommodation response to aniso-accommodative stimuli in isometropia. Ophthalmic Physiol Opt 2015; 35: 552–561, which has been published in final form at doi: 10.1111/opo.12225. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Deposited On: 22 Jun 2015 22:36
Last Modified: 03 Oct 2016 05:30

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