| 摘要 |
PROBLEM TO BE SOLVED: To experience a shake when the head is moved by forming as a visual-field image a distorted image obtained by giving the distortion of a lens to an image changing as the visual field direction is changed when the angle of the face wearing spectacles is changed. SOLUTION: The visual-field image is the distorted image obtained by giving the distortion of the lens to the image which changes as the visual field direction is changed when the angle of the face wearing the spectacles is changed. Namely, a progressive multifocal lens has the problem that a shake is felt owing to a change in visual field direction when the head is moved since a body is viewed while distorted. The shake felt when the heat is moved is hardly to feel in a still image. For the purpose, an image processing part 13 performs a process for giving the distortion of the lens to a moving picture showing the change of the visual field corresponding to the movement of the head sensed by a head motion sensor 28 to display a distorted image showing the motion, thereby simulating the shake felt as if the face wearing the spectacles of progressive multifocal lenses were shaken.
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