Golden Posture – Bright Eyes Flashcard Set: Guiding Proper Sitting Posture and Protecting Vision for Secondary School Students

Abstract; In the context of increasing rates of refractive errors and poor study posture among students due to excessive use of electronic devices, the study “Golden Posture – Bright Eyes Flashcard Set: Guiding Proper Sitting Posture and Protecting Vision for Secondary School Students” was conducted to develop a cost-effective and practical intervention. According to the 2024 report of the Vietnam Ophthalmology Council, approximately 5 million children (30–40% of school-age population) suffer from refractive errors, with more than 50% caused by improper study habits and excessive screen time. At Nguyen Trai Secondary School, 70% of students are nearsighted, and 60% are unaware of or unable to maintain correct sitting posture. The study designed a set of 28 flashcards illustrating proper posture, lighting, and study distance, incorporating a 28-day habit formation model and gamification elements. The 4-week experiment involved 191 students in grades 7–8, using the CVS-Q Teen (to assess eye strain) and FHP (to measure head–neck posture). Results showed significant improvements: average eye strain scores decreased by 70%, head–neck posture deviation reduced by 65%, positive learning perception increased by 24.6%, and 92% of students maintained correct posture by the end of the intervention. The study demonstrates that the flashcard set is a visual, user-friendly, and effective tool that promotes positive behavioral change and enhances visual health among students.