To provide a method of updating a field of vision which may not provide a user with discomfort in a virtual space.SOLUTION: A program according to the present invention makes a computer execute a step (step S1270) of detecting motion of a sight line of a user, a step (S1280) of specifying a range displayed on a display in a virtual space in response to the detected motion of the sight line, and a step (S1290) of updating a visual field image so that the visual field image corresponding to the specified range should be displayed.SELECTED DRAWING: Figure 12
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