EFFECTS ON VISUAL FUNCTIONS DURING TASKS OF OBJECT HANDLING IN VIRTUAL ENVIRONMENT WITH A HEAD MOUNTED DISPLAY

This study examined the effects on visual functions of a prolonged han dling task within the helmet-mounted display environment. Both version eye movement and accommodative response became gradually slower durin g the 40-min task. Although delayed presentation of display after head movement noticeably worsened both visual responses, presentation dela y after hand movement did not significantly change the sluggishness of responses. Therefore it is suggested that decreasing time delay after head movement is a more important factor in order to improve human pe rformance of handling tasks within the HMD environment.