Sources of error in clinical measurement of the amplitude of accommodation

Burns, David and Allen, Peter M. and Edgar, David and Evans, Bruce J. W. (2019) Sources of error in clinical measurement of the amplitude of accommodation. Journal of Optometry. ISSN 1989-1342

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Official URL: https://doi.org/10.1016/j.optom.2019.05.002

Abstract

Measurement of the amplitude of accommodation is established as a procedure in a routine optometric eye examination. However, clinical methods of measurement of this basic optical function have several sources of error. They are numerous and diverse, and include depth of focus, reaction time, instrument design, specification of the measurement end-point, specification of the reference point of measurement, measurement conditions, consideration of refractive error, and psychological factors. Several of these sources of inaccuracy are composed of multiple sub-sources, and many of the sub-sources influence the common methods of measurement of amplitude of accommodation. Consideration of these sources of measurement error casts doubt on the reliability of the results of measurement, on the validity of established normative values that have been produced using these methods, and on the value of reports of the results of surgery designed to restore accommodation. Clinicians can reduce the effects of some of the sources of error by modifying techniques of measurement with existing methods, but a new method may further improve accuracy.

Item Type: Journal Article
Keywords: Amplitude of accommodation, Accommodative amplitude, Measurement error, Clinical, Push-up
Faculty: Faculty of Science & Engineering
SWORD Depositor: Symplectic User
Depositing User: Symplectic User
Date Deposited: 23 May 2019 15:32
Last Modified: 14 Nov 2019 16:07
URI: http://arro.anglia.ac.uk/id/eprint/704357

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