Objective: To describe factors related to refractive errors in students aged 8–10 in four primary schools in Hai Phong City, 2024. Methods: A cross-sectional descriptive study was conducted. Results: The prevalence of refractive errors among students was 49.9%. Gender: Female students (OR: 1.3
95% CI: 1.1–1.5, p <
0.05). Geography: Urban students (OR: 2.9
95% CI: 2.5–3.4). Behavior: Students using computers (OR: 1.4
95% CI: 1.2–1.7), screen time >
1 hour/session (OR: 3.1
95% CI: 2.2–4.5)
TV viewing >
1 hour/session (OR: 2.3
95% CI: 1.9–2.8)
electronic gaming (OR: 1.2
95% CI: 1.01–2.4), gaming duration >
1 hour/session (OR: 1.5
95% CI: 1.2–2.0)
reading >
1 hour/session (OR: 1.5
95% CI: 1.1–1.9). Family history: Students with a family history of refractive errors (OR: 1.8
95% CI: 1.5–2.1). Parental knowledge: Parents with good knowledge about refractive errors (OR: 1.5
95% CI: 1.2–1.9).