Development of measurement and evaluation for useful field of view under eye and head free condition

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There have been numerous studies related to useful field of view with regard to ensuring safety during activities and preventing recognition failures that can result in human error. As a result, the form of the useful field of view has been determined and methods for its measurement have been proposed. Most studies have assumed a fixed gaze, however, thus failing to consider the useful field of view during eye movement. The present research takes an experimental approach toward discovering the effects of eye movement speed and direction on useful field of view, limiting eye movement speed to 30°/s. As a result, the direction of gaze movement, increases in speed, and the direction of the recognized object with respect to the focal point cause variation in the narrowing of the useful field of view