| 摘要 |
PROBLEM TO BE SOLVED: To provide a progressive refractive power spectacle lens, suitably determining an inset amount of a near vision part even when a pantoscopic angle is different from a standard one, and obtaining a distinct vision range for a near vision fused by right and left eyes to achieve comfortable binocular vision. SOLUTION: The progressive refractive power spectacle lens 1 includes a progressive part 13 continuously changing in refractive power, which is provided intermediate between a far vision part 11 and the near vision part 12. The inset amount H of the near vision part 12 is determined based on individual wearing status data of individual wearers and deflection of a visual line due to lens refraction. The individual wearing status data include information on the pantoscopic angle PA of the individual wearers. The inset amount H of the near vision part 12 is determined in consideration of the individual wearing state including the pantoscopic angle PA as well, so that it is possible to improve the problem of the conventional progressive refractive power spectacle lens 1 where distinct vision ranges for a near vision are not fused in the right and left eyes when the pantoscopic angle is different from the standard one. Thus, comfortable binocular vision can be achieved. COPYRIGHT: (C)2011,JPO&INPIT
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