A review of depth of focus in measurement of the amplitude of accommodation

Burns, David and Allen, Peter M. and Edgar, David and Evans, Bruce J. W. (2018) A review of depth of focus in measurement of the amplitude of accommodation. Vision, 2 (3). p. 37. ISSN 2411-5150

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Official URL: https://doi.org/10.3390/vision2030037

Abstract

Abstract: The aim of this review is to investigate the role of depth of focus (DoF) as a potential confounding variable in the measurement of the amplitude of accommodation (AoA). The role of DoF in human vision is briefly summarised, and it is noted that the prevalent method of measuring AoA is the push-up method. Factors influencing the effect of DoF on the push-up and other methods of measuring AoA are reviewed in detail. DoF is shown to add substantial measurement error in the routine assessment of accommodation when the AoA is measured by methods involving subjective judgement of an object’s clarity. Reliable compensation for this source of error is not realistically possible because of the complexity of the aetiology of DoF, and its inter-individual and intra-individual variation. The method of measurement also influences the extent of the error. It is concluded that methods of measurement of AoA that exclude DoF should be preferred.

Item Type: Journal Article
Keywords: Amplitude of accommodation, Depth of focus, Measurement error, Optometry
Faculty: Faculty of Science & Technology
Depositing User: Professor Peter Allen
Date Deposited: 17 Sep 2018 13:53
Last Modified: 17 Sep 2018 13:53
URI: http://arro.anglia.ac.uk/id/eprint/703585

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