en بررسی مهارت‌های بینایی در کودکان مقطع دبستان با عملکرد ضعیف در خواندن و نوشتن بینایی سنجی Optometry پژوهشي Research <strong>Objective:</strong> To determine visual skills in primary school children with poor performance in reading and writing.<br> <strong>Methods</strong>: This cross-sectional study was conducted on 28 poor-performances in reading and writing students from 600 schoolchildren, based on their teacher&#39;s score and 14 control children in second to sixth grade in one of the primary schools of Tehran. Visual acuity, refractive error, distance and near horizontal heterophoria, amplitude and facility of accommodation, amplitude and facility of vergence were measured in all subjects of both groups.<br> <strong>Results</strong>: Statistical comparison showed a higher hyperopia (p <0.001) and astigmatism (p <0.05) in the study group. Facility of accommodation and vergence showed lower values in the study (p < 0.001). The near exophoria was significantly greater in the study group (p<0.001). <span dir="RTL"></span><br> <strong>Conclusion:</strong> This study indicates that children with poor performance in reading and writing had difficulty in visual skills. Management of visual problems in children with poor reading and writing performance should be considered. Refractive errors, Binocular vision, reading disability, dyslexia. 149 155 http://fdj.iums.ac.ir/browse.php?a_code=A-10-28-3&slc_lang=en&sid=1 Razieh Ahangarani راضیه آهنگرانی ahangarani74@gmail.com 10031947532846001693 10031947532846001693 No Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran. گروه اپتومتری، دانشکده علوم توانبخشی، دانشگاه علوم پزشکی ایران، تهران، ایران. Ebrahim Jafarzadehpur ابراهیم جعفرزاده پور jafarzadehpour.e@iums.ac.ir 10031947532846001694 10031947532846001694 Yes Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran. گروه اپتومتری، دانشکده علوم توانبخشی، دانشگاه علوم پزشکی ایران، تهران، ایران. Ali Mirzajani علی1 میرزاجانی Mirzajani.a@iums.ac.ir 10031947532846001695 10031947532846001695 No Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran. گروه اپتومتری، دانشکده علوم توانبخشی، دانشگاه علوم پزشکی ایران، تهران، ایران. Alireza Mohamadi4 علیرضا محمدی alremone@gmail.com 10031947532846001696 10031947532846001696 No Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran. گروه اپتومتری، دانشکده علوم توانبخشی، دانشگاه علوم پزشکی ایران، تهران، ایران.