Spectacle lens

Abstract

A spectacle lens is produced through a first step of stacking a first member colored in cyan and a second member colored in red and integrating the first member and the second member, and a subsequent second step of partially polishing a periphery of a convex surface of the first member. Provision of the polishing step enables unique design and production of appropriate numbers of widely varied distinctive spectacle lenses.

What is claimed is: 
     
         1 . A spectacle lens comprising first and second rigid plastic members having different tones and permanently integrated with each other without a gap,
 the spectacle lens being produced through   a first step of stacking a first member colored in a first tone and disposed outside so as not to face an eye, and a second member colored in a second tone and disposed inside so as to face the eye, and integrating the first member and the second member,   and a second step of partially removing a peripheral surface portion of the lens having been processed in the first step, by causing a processing head to be in contact with or applying laser beams to a convex surface of the first member or a concave surface of the second member, wherein   in the second step,   the plastic member is polished in a direction substantially perpendicular to the convex surface of the first member or the concave surface of the second member,   to form a border line between a peripheral edge of the first member and the second member, or between a peripheral edge of the second member and the first member,   to achieve clear tone change with respect to the border line.   
     
     
         2 . The spectacle lens according to  claim 1 , wherein the border line has a curved shape with an inflection point. 
     
     
         3 . The spectacle lens according to  claim 1 , wherein, in the second step, an annular band portion inside a peripheral edge of the first member is removed continuously or intermittently to form an annular band line having a different tone. 
     
     
         4 . The spectacle lens according to  claim 1 , wherein the first step is executed after
 a first material being colored is molded to have a predetermined curvature, or   the first member being uncolored is molded to have a predetermined curvature and is then dyed or printed to be colored.   
     
     
         5 . The spectacle lens according to  claim 4 , wherein
 the second member is obtained by molding a second material being colored to have a predetermined curvature, or   the second member being uncolored is molded to have a predetermined curvature and is then dyed or printed to be colored.   
     
     
         6 . The spectacle lens according to  claim 1 , wherein
 the first member is colored by providing a colored layer between the first member and the second member or providing the colored layer on the convex surface of the first member, and   in the second step,   the plastic member is polished in a direction substantially perpendicular to the convex surface of the first member to form a border line between a peripheral edge of the first member and the second member,   to achieve clear tone change with respect to the border line.   
     
     
         7 . The spectacle lens according to  claim 6 , wherein the second member is colored by providing a colored layer on the concave surface of the second member.