In this study, we focus on the observation characteristics of 3DCAD and VR during the experiment. Based on eye data collected during the experiment, we grasped the observation characteristics such as the observation time, the distance moved through the design plan, the direction of the gaze when the subjects were searching for incorrect conditions. In addition, we analyzed the differences in observation characteristics between 3DCAD and VR tools, and the relationship between the observation characteristics and the situations in which incorrect conditions were found.
