Study on the Effects of Long-Term Vibration and Visual Tasks on Visual Acuity in the Car

In this research, to maintain a passenger’s good visual acuity during long riding, we investigated the effects of long-term vibration and visual task on the visual acuity. The results showed that after performing the prolonged visual tasks in the vibration-exposed state, the visual acuity in the stationary state remained unchanged, but the visual acuity in the vibration-exposed state decreased. From these results, it is assumed that among the functions of the eye, the function of stabilizing the eye against vibrations is most likely to deteriorate due to fatigue caused by visual loads. Consequently, to maintain visibility in the car during long car trips, it is important to suppress head movement. This helps prevent fatigue in the eye stabilization function.