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A VR-System to Assess Stereopsis with Visual Stimulation: A Pilot Study of System Configuration

Abstract:

Stereopsis is the binocular perception of depth. The lack of accurate depth perception can have a high impact on life, from early childhood learning to the jobs and daily tasks we are able to do. One of the human factors that can influence in the aviation safety is the lack of stereoscopic vision. Our main aim was to develop a virtual system that includes interaction and immersion using a VR device of visualization. It included a virtual environment, several 3D objects and a virtual task to assess stereoscopic vision in adults. Two groups of military pilots participated in the experimental study (N = 20). Group 1 were participants without experience (N = 10) and Group 2 were participants with experience (N = 10). The components of our VR-system SAS have allowed to assess the stereopsis through visualization, recognition and number of 3D objects seen. The HMD used, allowed the participants of both groups to feel a more immersive experience, have better depth perception and see 3D objects inside the virtual environment. Regarding to the 3D sensations and satisfaction, the participants found it easier to use the VR-system SAS, and they would also participate again and use this system. Furthermore, with both, the LANG Stereo-test and the VR-system, the participants were able to see the 3D objects shown. The results suggested that our system is valid to assess stereopsis. Moreover, our VR-system could be a very useful technological tool in the field of ophthalmological evaluation and pilot training.