Comparison of visual status of Iranian military and commercial drivers

Ghasemi, M. and Yazdi, S. H. H. and Heravian, J. and Jafarzadehpur, E. and Rezaee, M. (2015) Comparison of visual status of Iranian military and commercial drivers. Iranian Red Crescent Medical Journal, 17 (4).

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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, oneway 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. © 2015, Iranian Red Crescent Medical Journal.

Item Type: Article
Additional Information: Cited By :2 Export Date: 16 February 2020 Correspondence Address: Yazdi, S.H.H.; Contact Lens and Visual Optics Laboratory, School of Optometry and Vision Science, Queensland University of TechnologyAustralia
Uncontrolled Keywords: Color vision Contrast sensitivity Visual acuity Visual fields adult army Article cross-sectional study D15 test driver human male normal human pelli robson letter chart questionnaire vision vision test visual acuity chart visual field
Subjects: WW Ophthalmology
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib5 lib5
Date Deposited: 04 May 2020 03:40
Last Modified: 04 May 2020 03:40

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