Purpose : This study aimed to investigate the relationship between work intensity factors (repetitive tasks, physically demanding tasks, and prolonged sitting) and eye fatigue among workers. Methods : Data from the 7th Korean Working Conditions Survey were analyzed using IBM SPSS Statistics 27.0. Descriptive statistics, including frequencies and percentages, were calculated for participants’ general characteristics. The association between work intensity and eye fatigue was examined using chi-square tests, with a significance level set at p<0.050. Binary logistic regression analysis was performed to evaluate the independent effects of each variable, adjusting for age and gender. Results : Repetitive tasks, physically demanding tasks, and prolonged sitting were significantly associated with eye fatigue. These associations remained significant after adjusting for age and gender, indicating that these work intensity factors are independent risk factors for eye fatigue. Conclusion : The findings indicate that repetitive tasks, physically demanding tasks, and prolonged sitting independently contribute to the occurrence of eye fatigue among workers. This provides evidence that work intensity directly affects visual strain and health, highlighting the need for workplace improvements, structured breaks, and preventive health management programs to reduce visual burden and promote worker well-being.