| 摘要 |
A spectacle frame shape data processing method is provided which is applied before lenses are ground or cut according to a frame shape to be fitted in the frame, and by which a three-dimensional frame shape representing the distance between frame rims, inclinations of the frame rims, contours of inner peripheral grooves, etc. can be accurately measured by a frame shape measuring apparatus, and measurement values are corrected such that the frame rim shapes are in bilateral symmetry. Forward directions of the right and left frame rims are calculated, a forward direction of spectacles is calculated based on the calculated forward directions of the right and left frame rims, the direction of a datum line of the spectacles in a plane perpendicular to the calculated forward direction of the spectacles is calculated, and values representing the shape of a predetermined part of the frame rims is calculated based on the calculated forward directions of the right and left frame rims, the calculated forward direction of the spectacles, and the calculated direction of the datum line of the spectacles.
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