| 摘要 |
PROBLEM TO BE SOLVED: To obtain a spectacle lens having excellent optical performance, a small lens center thickness, good appearance and plus diopter. SOLUTION: Both of a refractive face 1 on an object side and a refractive face 2 on an eye side in a wearing state of this spectacle lens are formed to aspherical surface forms and the spectacle lens has the plus diopter. In such a case, the value of a curvature difference Z=ρm-ρs between the curvatureρm (unit: m-1) in a meridian direction and the curvatureρs (unit: m-1) in a sagital direction decreases monotonously in a range from the optical center 3 of the spectacle lens to a distance of 20 mm along the meridian at the refractive face on the object side and the refractive face on the eye side.
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