Correlation between VND-Q, NIBUT, and OSDI score.

BackgroundDry eye disease, a prevalent condition globally, affects the quality of the tear film and, subsequently, vision, especially during visually demanding tasks like driving at night. This study aims to evaluate the relationship between tear film stability, dry eye symptoms, and self-reported difficulties in night driving among Malaysian adults. Methods: Ninety participants aged 18-40 years with at least one year of night driving experience were recruited. Tear film stability was assessed using non-invasive tear break-up time (NIBUT), while dry eye symptoms were measured with the Ocular Surface Disease Index (OSDI). Night driving vision difficulties were evaluated using the Vision and Night Driving Questionnaire (VND-Q). Results: Participants with shorter NIBUT (mean = 3.95 ± 1.32 s; median = 3.97 s, IQR: 2.87-5.03 s) reported significantly greater difficulties in night driving compared to those with normal NIBUT (mean = 9.80 ± 3.86 s; median = 8.23 s, IQR: 6.90-11.70 s) (p