| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ergorama as to a progressive multifocal opthalmic lens for a spectacle of correlating a sight line-directed point with a direction of each sight line. Ž<P>SOLUTION: The present invention relates to the set of progressive multifocal opthalmic lenses for the spectacles, each thereof has the first progressive multifocal surface and the second progressive multifocal surface, preferably a spherical face. The present invention proposes a definition of the lens set as to an optical characteristic of the lens, in particular, wearer power when worn and an oblique astigmatism aberration. Consequently, the present invention determines an ergorama correlated with each view point direction, a target object point, and prescribed power, under a worn condition. The ergorama supplies a power target for determination due to optimization of the lens, and is used in a radial-directional plotting program in order to calculate the optical characteristic during the optimization. The set of lenses has substantially identical optical performance as to prescribed addition calculation, irrespective of the power of a hyperopia reference point. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
