Title

A portable device for the assessment of dynamic visual acuity

Authors

Authors

J. A. A. Smither;R. S. Kennedy

Comments

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Abbreviated Journal Title

Appl. Ergon.

Keywords

Dynamic visual acuity; Visual screening; Portable DVA; AGE; TESTS; Engineering, Industrial; Ergonomics; Psychology, Applied

Abstract

Dynamic Visual acuity (DVA) thresholds are among the few visual functions predictive of automobile crashes. DVA is also sensitive to alcohol and aging. However, measuring DVA is awkward because there is no standardized, efficient, flexible apparatus for DVA assessment. In this project, we developed a prototype of an automated, portable DVA system using a low-energy laser, and we compared this laser DVA with the traditional device in two within-subjects, repeated measures designs. The two studies included 48 participants (22 males and 26 females with an average age of 18.33 years). The most important findings were that: (I) retest reliabilities of the two DVA devices were comparable and higher with the laser; (2) average correlations between the two devices were r = 0.62 (p < 0.01) and r = 0.65 (p < 0.01) for the two designs respectively; and (3) after correction for reliability attenuation these improved to r = 0.92 and r = 0.78. These findings indicate that a flexible DVA laser device can be developed to measure the same construct as the more traditional bulky DVA device. (C) 2009 Elsevier Ltd. All rights reserved.

Journal Title

Applied Ergonomics

Volume

41

Issue/Number

2

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

266

Last Page

273

WOS Identifier

WOS:000272406300011

ISSN

0003-6870

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