| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a progressive-power lens having a progressive surface on one side and an aspherical or atoroidal surface on the other side, the lens shape being designed so that a high degree of aberration correction can be carried out on the periphery of the lens and the distance power and addition power of the lens acting on the eye of a wearer substantially correspond to the distance power and addition power measured by a lens meter. <P>SOLUTION: The progressive-power lens includes the progressive surface 1 and an aspherically designed surface 2 formed of the aspherical or atoroidal surface, and the reference point Ph of the aspherically designed surface 2 is located in the vertical direction of the lens below a prism reference point P3 of the progressive surface 1 and above a near design reference point P2. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
