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    • 7. 发明申请
    • BIFOCAL LENS AND BIFOCAL EYEGLASSES
    • 双眼镜和双眼眼镜
    • US20110228216A1
    • 2011-09-22
    • US12671800
    • 2008-10-21
    • Hisayoshi KurosakiTakashi Tsutsumi
    • Hisayoshi KurosakiTakashi Tsutsumi
    • G02C7/06
    • G02C7/06
    • A bifocal lens and bifocal eyeglasses by which strangeness felt during using a near-vision portion is removed, a place according to the purpose of use can clearly be selected, and costs are reduced. The bifocal lens for eyeglasses is constituted of a single material with a uniform refractive index and is provided with a lens for presbyopia (1B) used for looking at something near at a portion of a body lens part (1A) used for looking at something in the distance. The lens for presbyopia (1B) is formed of an upper side which is generally horizontal when used, a lateral side on the ear side which continues to the upper side and expands toward the ear, and a lower side parallel to the peripheral shape of the lower side of an eyeglass frame to be generally circular-arc or generally rectangular as a whole. The upper side and the lateral side form a generally straight boundary line which can be recognized by a user.
    • 去除了在使用近视觉部分期间感到陌生的双焦点透镜和双焦眼镜,可以清楚地选择根据使用目的的位置,并降低成本。 用于眼镜的双焦点透镜由具有均匀折射率的单一材料构成,并且设置有用于观察用于观察身体透镜部分(1A)的用于观察某物的部分附近的东西的用于老花眼镜(1B)的透镜 距离。 用于老花眼镜(1B)的镜片由使用时大致水平的上侧形成,耳部侧的朝向上侧延伸的侧面朝向耳朵扩张,下侧与 眼镜架的下侧通常为圆弧形或整体上大致矩形。 上侧和外侧形成可由使用者识别的大致直线的边界线。