Background: Vision is the primary means of integration between individual and external environment. Childhood visual impairment due to refractive errors is a significant problem in school children. School children constitute a special group as uncorrected refractive errors cause a vulnerable impact on student routine school work, physical, mental, behavioral development as well as day to day activities. This warrants early detection and treatment to prevent permanent disability. Objectives: To study the prevalence of refractive errors in secondary school children and to associate factors affecting reduced vision in school children. Method: A cross-sectional study was conducted on school children of a Zilla Parishad High School. Visual acuity test was performed using Snellen’s E Chart and, subjects with VA≤6/9 were examined for refractive error by an optometrist using a trial lens set. A Pretested questionnaire was administered. Parental consent was obtained and assent was taken before the examination, children whose parents did not give consent were excluded. A total of 314 students participated. Data were entered in Microsoft excel sheet and analyzed using SPSS version 21. Results were expressed as proportions for different study variables. Results: Out of 314 students, the majority 161(51.27%) of study participants were girls. The highest number of students (68%) was between 14-15yrs. Among 314 students examined, 40 (12.74%) students were suffering from refractive errors, myopia being the commonest (10.2%), Astigmatism-affected in 8 (2.54%) children. Most of the students (60.5%) were in the lower middle socio-economic class. The percentage of the population with 2-4hrs/day screen exposure duration is 42.35%. But there is no statistical significance of reduced vision was observed with taken study variables, considering a p-value<0.05 was taken as a significant association. Conclusions: The prevalence of refractive errors was 12.74% in this study. Children should be educated regarding ocular hygiene, early correction of refractive errors, limited screen time. Recommended planning appropriate eye care programmes to reduce the burden of visual impairment among the younger population.