Comparison of visual status of Iranian military and commercial drivers

Ghasemi, Mohammad, Hoseini-Yazdi, Seyed Hosein, Heravian, Javad, Jafarzadehpur, Ebrahim, & Rezaee, Maryam (2015) Comparison of visual status of Iranian military and commercial drivers. Iranian Red Crescent Medical Journal, 17(4), e19751.

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Abstract

Background

There is no legal requirement for Iranian military truck drivers to undergo regular visual checkups as compared to commercial truck drivers.

Objectives

This study aimed to evaluate the impact of drivers’ visual checkups by comparing the visual function of Iranian military and commercial truck drivers.

Patients and Methods

In this comparative cross-sectional study, two hundred military and 200 commercial truck drivers were recruited and their Visual Acuity (VA), Visual Field (VF), color vision and Contrast Sensitivity (CS) were assessed and compared using the Snellen chart, confrontation screening method, D15 test and Pelli-Robson letter chart, respectively. A questionnaire regarding driving exposure and history of motor-vehicle crashes (MVCs) was also filled by drivers. Results were analyzed using an independent samples t-test, one-way ANOVA (assessing difference in number of MVCs across different age groups), chi-square test and Pearson correlation at statistical significance level of P < 0.05.

Results

Mean age was 41.6 ± 9.2 for the military truck drivers and 43.4 ± 10.9 for commercial truck drivers (P > 0.05). No significant difference between military and commercial drivers was found in terms of driving experience, number of MVCs, binocular VA, frequency of color vision defects and CS scores. In contrast, the last ocular examination was significantly earlier in military drivers than commercial drivers (P < 0.001). In addition, 4% of military drivers did not meet the national standards to drive as opposed to 2% of commercial drivers. There was a significant but weak correlation between binocular VA and age (r = 0.175, P < 0.001). However, CS showed a significantly moderate correlation with age (r = -0.488, P < 0.001).

Conclusions

The absence of legal requirement for regular eye examination in military drivers caused the incompetent drivers to be missed in contrast to commercial drivers. The need for scientific revision of VA standard for Iranian drivers is also discussed. The CS measurement in visual checkups of older drivers deserves to be investigated more thoroughly.

Impact and interest:

1 citations in Scopus
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1 citations in Web of Science®

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ID Code: 88016
Item Type: Journal Article
Refereed: Yes
Keywords: Visual acuity, Visual field, Colour vision, Contrast sensitivity, Driving
DOI: 10.5812/ircmj.17(4)2015.19751
ISSN: 2074-1804
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, Iranian Red Crescent Medical Journal.
Copyright Statement: This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.
Deposited On: 06 Oct 2015 00:28
Last Modified: 10 Oct 2015 16:34

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