The Relation between Eye-Head Coordination and Useful Field of View

Abstract

Experiments on useful field-of-view (UFOV) and eye-head coordination were employed to propose an evaluation method for using it during visual information processing, without distracting the subject's main task. Eye and head movement were measured under the condition in which the subject's UFOV was controlled. In particular, subjects performed two tasks: a simple task for inducing a decrease in alertness and a visual target detection (VTD) task for inducing eye-head coordination. In the simple task, the subjective arousal level and UFOV were measured. UFOV was measured by subjective response to a visual target. As a result of conducting the simple task, it was found that UFOV was narrowed at the time of low arousal. In the VTD task, eye and head movement were measured under the condition in which visual angular distance to the visual target was controlled in steps. As a result of conducting the VTD task, it was found that eye-head coordination to the visual target was influenced by UFOV, eye movement precedes viewing a visual target inside of the UFOV, and head movement precedes viewing a visual target outside of the UFOV. Furthermore, it was indicated that it is possible to detecting narrowed UFOV using the relation between visual angular distance to visual target and response time lag of eye and head movement.