Estimation System of Sensitivity to Eye Fatigue Based on Blinking for the Prevention of VDT Syndrome.

We live in an information society, and convenient information devices like smartphones and PCs have become indispensable in our lives. This situation has not only good effects on us but also bad effects. Most of them are health-related problems, and VDT syndrome is a typical example. This disease is caused by the accumulation of ocular fatigue due to prolonged VDT work, leading to a variety of systemic symptoms. Most of these problems can be avoided with proper preventive measures, but many users ignore them. We believe that this is since users do not know their eye fatigue accurately. In order to improve this situation, we present a new eye fatigue prevention system that focuses on the relationship between the accumulation of eye fatigue and changes in blink rate. Our system detects the discrepancy between the ocular fatigue calculated by CFF (Critical Fusion Frequency) and the subjective ocular fatigue from the user's blink features. The experimental results suggest the possibility of predicting the discrepancy between the subject's subjective time of eye fatigue and the objective time of eye fatigue from the median number of blinks. Regular use of our proposed system will make users aware of their eye fatigue sensitivity and will significantly reduce the risk of VDT syndrome and eye strain.