| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a progressive refractive power lens improved in an optical performance of a progressive refractive power lens group having a certain lens performance, wherein the lens performance includes exhibiting such a case that lens curves becomes deeper in the progressive refractive power lens. Ž<P>SOLUTION: In the progressive refractive power lens, assuming that parameters are set as follows: X is a vertical diopter for farsighted diopter and Y is a surface curve as converted using the refractive index of 1.523, applicable conditions of Y>0.46X+5.0 and Y<0.55X+5.4 are satisfied when X≤0 and X>0, respectively. In that case, the relation of (a check diopter for nearsightedness set on a shortsighted diopter measurement position in a near-view part region)-(a check diopter for farsightedness set on a farsighted diopter measurement position in a far-view part region)>(an addition diopter set by orders) is satisfied. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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