en Epidemiology Original Article <div style="text-align: justify;"><span style="font-size:10pt"><span style="line-height:150%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Background:</span></span></span></b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> Poor vision in drivers may represent an important cause of risk for car accidents. The purpose of this study was to analyze the Association between visual acuity in heavy vehicle drivers and the occurrence of road accidents.</span></span></span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:150%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Materials and Methods:</span></span></span></b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> This cross-sectional study was carried out on 200 drivers of heavy motor vehicles (trunks) in Tehran province in 2019. Data were gathered using a checklist of demographic and background features, a standardized driver safety questionnaire, and drivers&#39; driving records obtained from occupational health centers. In addition, drivers&#39; visual acuity status was assessed using Snellen chart. Descriptive statistics, Spearman&#39;s correlation, and Chi-square were utilized to analyze the data using SPSS version 21 and Microsoft Excel 2016.</span></span></span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:150%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Results:</span></span></span></b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> Visual acuity scores for the right and left eyes were 9.16 &plusmn; 1.04 and 9.20 &plusmn; 1.08, respectively. All drivers with no prior experience with crashes on roads had normal vision acuity. <a name="_Hlk186968533">The visual acuity scores in both eyes were not related to occurrence of accidents or near miss accidents (P>0.05)</a>, while drivers who had higher visual acuity score experienced fewer numbers of near miss accidents and accidents (p<0.001). The most common accidents involved collisions between vehicles (60%), which had negative correlations with the right visual acuity (p<0.001, r = - 0.24) and the left one (p<0.05, r = - 0.21).</span></span></span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:150%"><span courier="" new="" style="font-family:"><span style="color:black"><b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Conclusion:</span></span></span></b><span style="font-size:11.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> There was a high rate of road accidents among the studied heavy vehicle drivers. <a name="_Hlk186968568">Also, impaired visual acuity can contribute to high accident and near miss rates among drivers.</a></span></span></span></span></span></span></span></div> Accident,Drivers,Motor Vehicles,Safety,Visual Acuity, 1 7 http://johe.rums.ac.ir/browse.php?a_code=A-10-786-1&slc_lang=en&sid=1 Sepideh Keyvani skeyvani@razi.tums.ac.ir 22400319475328460012582 22400319475328460012582 No Ph.D. Student in Occupational Health Engineering, Dept. of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. Tehran University of Medical Sciences Farzaneh Mehri farmehr9i@gmail.com 22400319475328460012583 22400319475328460012583 No M.Sc. in Occupational Health Engineering, Dept. of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. Tehran University of Medical Sciences Fatemeh Fasih-Ramandi f-fasihr@razi.tums.ac.ir 22400319475328460012584 22400319475328460012584 No Ph.D. Student in Occupational Health Engineering, Dept. of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. Tehran University of Medical Sciences Ali Karimi a_karimi@tums.ac.ir 22400319475328460012585 22400319475328460012585 Yes Professor, Dept. of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. Tehran University of Medical Sciences