CONTOUR PRISM LENS WITH PROGRESSIVE POWER

    公开(公告)号:US20240393618A1

    公开(公告)日:2024-11-28

    申请号:US18324898

    申请日:2023-05-26

    Abstract: A contour prism progressive lens has a position dependent optical power and a position dependent horizontal prism, and a distance-vision reference point and a near-vision reference point. It is characterized by a coordinate system with its vertical axis running through the distance-vision reference point and has an optical power at the near-vision power reference point that exceeds the optical power at the distance-vision reference point by a value between 0.25 diopter and 1.0 diopter. The horizontal prism on the vertical axis at a vertical coordinate of the near-vision reference point differs from the horizontal prism at the distance-vision reference point by more than 0.2 prism diopter base-in; and the optical power along a horizontal crosscut of the contour prism progressive lens through the near-vision reference point has a broad maximum where the region where the optical power is at least 85% of its peak is at least 5 mm wide.

    CONTOUR PRISM LENS WITH PROGRESSIVE POWER

    公开(公告)号:US20240393619A1

    公开(公告)日:2024-11-28

    申请号:US18324812

    申请日:2023-05-26

    Abstract: A contour prism lens, having a position dependent optical power and a position dependent horizontal prism, and having a distance-vision reference point and a near-vision reference point, the contour prism lens being characterized by a coordinate system with its vertical axis running through the distance-vision reference point, wherein: the optical power at the near-vision reference point exceeds the optical power at the distance-vision reference point by less than 0.5 diopter; the horizontal prism on the vertical axis at a vertical coordinate of the near-vision reference point differs from the horizontal prism at the distance-vision reference point by more than 0.2 prism diopter base-in; and the optical power along a horizontal crosscut of the contour prism lens through the near-vision reference point has a power plateau, where the optical power remains within a 0.1 diopter wide range throughout a horizontal region at least 5 mm wide, comprising the near-vision reference point.

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