| 摘要 |
PROBLEM TO BE SOLVED: To secure not only excellent appearance but also an excellent visual field by hardly having a step on an eye face and an objective face. SOLUTION: The whole region of the objective side face 1 of a far and near bifocal lens for eyeglasses is prepared at a fixed curvature, and concerning the eye face 2, an upper side and lower side are made different in curvatures. By the mutual relationship of the curvatures of the objective face 1, the whole objective face is smoothed without any projection part and any step by preparing the curvatures of the eye faces 2a, 2b in each region respectively so that the upper side is a region F for myopia correction and the lower side is a region N for hypermetropia correction. Furthermore, light is largely refracted after passing a polarizing film 3 to correct hypermetropia without largely reflecting light before passing the polarizing film 3 by embedding the polarizing film 3 in an intermediate part between the objective face 1 and the eye face 2. COPYRIGHT: (C)2008,JPO&INPIT
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