| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a photochromic lens which can have a color gradation due to partial color development under light irradiation. <P>SOLUTION: A spectacle lens includes a photochromic layer including a photochromic pigment having a photochromic property. In the photochromic layer, the photochromic property of the photochromic pigment included in a partial region of the layer is lessened or lost to produce a color gradation under light irradiation. <P>COPYRIGHT: (C)2013,JPO&INPIT |
