Screen-Induced Transient Myopia (SITM) in Medical Students during Exam Seasons: A Prospective Study

Abstract

Background: Screen-induced transient myopia (SITM) represents a short-lived blurring of distance vision following sustained near work. Despite its clinical relevance, little is known about its occurrence and predictors during academically intense periods among medical students. This study examined the prevalence, correlates, and predictors of SITM across pre-exam, exam, and post-exam phases in a cohort of undergraduate medical students.

Materials & Methods: A prospective cohort design with repeated measures was employed among 409 students. Data were collected through a structured online questionnaire covering screen-use behaviors, ergonomic factors, and ocular symptoms. SITM was defined as blurred distance vision that intensified during the exam period. Analyses included chi-square tests for associations and logistic regression to identify independent predictors.

Results: SITM was highly prevalent during exams and significantly associated with vision changes, visual discomfort, prolonged near work, closer viewing distances, and increased screen use relative to baseline. Logistic regression identified visual discomfort (OR = 6.30, p < .001), prolonged near work difficulty (OR = 3.11, p < .001), and screen time change (OR=1.46, p=.016) as the strongest predictors. SITM was also linked to self-reported academic impact.

Conclusion: SITM is a frequent, functionally relevant issue among medical students during exams. Preventive strategies should emphasize behavioral modifications and institutional support to mitigate risks.

Faridpur Med. Coll. J. 2026;21(1):22-29