| 摘要 |
A progressive refractive power glasses lens excellent in a wearing feeling even when it is formed to have a thinness desirable in terms of weight and design by providing a gentle base curve, characterized by being designed so that; when a distance section consists of a far-sightness correction lens having a positive refractive power, setting an astigmatism on the lens surfa ce at each point on a main close observation line of the distance section to ze ro is not prioritized, and, instead, minimizing a transmission astigmatism at each point on the main close observation line is prioritized; while, when th e distance section consists of a near-sightness correction lens having a negative refractive power, setting an astigmatism on the lens surface at eac h point on the main close observation line of the distance section to zero is not prioritized, and, instead, minimizing a transmission average refractive power error at each point on the main close observation line is prioritized.
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