Multifocal ophthalmic lens pair
    11.
    发明授权
    Multifocal ophthalmic lens pair 失效
    多焦点眼科镜片对

    公开(公告)号:US5485228A

    公开(公告)日:1996-01-16

    申请号:US246644

    申请日:1994-05-20

    IPC分类号: A61F2/16 G02C7/04 G02C7/06

    摘要: A pair of ophthalmic lenses both containing at least two optical powers, one for near vision and one for distance vision are described, both containing in the center portion of the lens the distance optical power. In the preferred embodiment, the remainder of the lens is comprised of annular portions made up of one or more optical zones to provide the desired combined, cumulative ratio of near and distance focal length areas at each pupil diameter. The distance portion located in the center is appropriately suited to the real world situation of requiring distance vision under high illumination situations.

    摘要翻译: 描述了一对包含至少两个光焦度的眼镜片,一个用于近视和一个用于远视的眼镜片,两者都在透镜的中心部分包​​含距离光焦度。 在优选实施例中,透镜的其余部分包括由一个或多个光学区域组成的环形部分,以提供每个瞳孔直径处的近距离焦距区域和距离焦距区域的期望的组合累积比率。 位于中心的距离部分适合于在高照度情况下需要远距离视觉的现实世界。