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Asymmetrical accommodation in hyperopic anisometropic amblyopia

Toor, S., Horwood, A. M. and Riddell, P. (2018) Asymmetrical accommodation in hyperopic anisometropic amblyopia. British Journal of Ophthalmology, 102 (6). pp. 772-778. ISSN 0007-1161

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To link to this item DOI: 10.1136/bjophthalmol-2017-310282

Abstract/Summary

Background/Aims: To investigate the presence of asymmetrical accommodation in hyperopic anisometropic amblyopia. Methods: Accommodation in each eye and binocular vergence were measured simultaneously using a PlusoptiX SO4 photorefractor in 26 children aged 4 to 8 years with hyperopic anisometropic amblyopia and 13 controls (group age-matched) whilst they viewed a detailed target moving in depth. Results: Without spectacles, only 5 (19%) of anisometropes demonstrated symmetrical accommodation (within the 95%CI of the mean gain of the sound eye of the anisometropic group), whereas 81% demonstrated asymmetrical accommodation. Of those, 15 (58%) showed aniso-accommodation and 6 (23%) demonstrated “anti-accommodation” (greater accommodation for distance than for near). In those with anti-accommodation the response gain in the sound eye was (0.93 ±0.20) whilst that of the amblyopic eye showed a negative accommodation gain of (-0.44 ±0.23). Anti-accommodation resolved with spectacles. Vergence gains were typical in those with symmetrical and asymmetrical accommodation. Conclusion: The majority of hyperopic anisometropic amblyopes demonstrated non-consensual asymmetrical accommodation. Approximately one in four demonstrated anti-accommodation.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Psychology and Clinical Language Sciences > Department of Psychology
Faculty of Life Sciences > School of Psychology and Clinical Language Sciences > Development
Faculty of Life Sciences > School of Psychology and Clinical Language Sciences > Perception and Action
ID Code:72157
Publisher:BMJ Publishing Group

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