International Journal of Preventive Medicine (Int J Prev Med)2008-780212102022010225622562ENDepartment of Family and Community Medicine, College of Medicine, Taif University & Department of Public Health and Community Medicine, Faculty of Medicine, Al-Azhar University, CairoCollege of Medicine, Taif UniversityDepartment of Ophthalmology, College of Medicine, Taif UniversityCollege of Medicine, Taif UniversityCollege of Medicine, Taif UniversityCollege of Medicine, Taif University20220102Background: People are increasingly using mobile phones rather than fixed telephones. Nearly everyone has a mobile phone and the vast majority of these are smartphone. The patterns of smartphone activities may put a significant number of populations especially students at risk of negative ocular problems. To determine the prevalence, pattern, and impact of smartphone use on ocular health among University students. Methods: A cross‑sectional study was conducted and 760 male and female students were selected from Medical and Pharmacy Colleges by multistage random sampling. A self‑administered structured questionnaire including sociodemographic and visual manifestations data was used to collect data. SPSS program version 22 was used to analyze data. Results: Out of 760 students selected, 546 (71.8%) responded. The overall prevalence of smartphone use was 90.84%. However, the age range for the beginning of smartphone use was 12– 18 years old (68.3%). In addition, the daily duration of smartphone use was 4–6 h/day (30.2%). Furthermore, females believed that they use smartphone more than usual compared to males. Moreover, ocular pain and/or dryness after prolonged time spent on smartphone use were more among smartphone users (39.7%). Finally, most of the students (66.0%) had one or more ocular problems after smartphone use. Conclusions: There is an association between smartphone use and occurrence of ocular manifestations. Health education programs on smartphone use and its ocular hazards are highly recommended.http://ijpm.mui.ac.ir/index.php/ijpm/article/view/2562http://ijpm.mui.ac.ir/index.php/ijpm/article/download/2562/717718397