| 摘要 |
PROBLEM TO BE SOLVED: To provide a new progressive power lens having eyesight compensating ability and astigmatism correcting ability on the same refractive surface by providing a new composing expression for composing a progressive refractive surface and a toric face. SOLUTION: A refractive surface 2 on an eyeball side or a refractive surface 3 on an object side is formed as a curved surface expressed by a composed refractive surface 14+15 where an original progressive refractive surface 14 set only to achieve desired eyesight compensating characteristic and an original toric surface 15 set only to achieve desired astigmatism correcting characteristic are composed by using the composing expression shown by a composing expression (1). COPYRIGHT: (C)2005,JPO&NCIPI
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