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    • 11. 发明申请
    • Contact lenses
    • 隐形眼镜
    • US20050068489A1
    • 2005-03-31
    • US10635817
    • 2003-08-06
    • Jordan HallJoseph LindacherMing Ye
    • Jordan HallJoseph LindacherMing Ye
    • G02C7/04
    • G02C7/048G02C7/043G02C7/044G02C2202/08
    • The present invention provides a contact lens having an orientation feature that does not provide an prism optical distortion and can maintain a predetermined orientation of the lens on an eye. A contact lens of the invention comprises an anterior surface and an opposite posterior surface. The anterior surface includes a vertical meridian, a horizontal meridian, a central optical zone, a blending zone extending outwardly from the central optical zone, a peripheral zone surrounding the blending zone, and an edge zone circumscribing and tangent to the peripheral zone. The presence of the blending zone ensures that the peripheral zone, the blending zone and the central optical zone are tangent to each other. The peripheral zone has a surface that, in combination with the posterior surface, provides in the peripheral zone a lens thickness which is characterized (1) by having a lens thickness which increases progressively from the top of the lens downwardly along each of the vertical meridian and lines parallel to the vertical meridian until reaching a maximum value at a position between the optical zone and the edge zone and then decreases to the edge of the edge zone; or (2) by having a mirror symmetry with respect to a plane cutting through the vertical meridian, by having a substantially constant thickness in a region around the horizonal meridian and by having a thickness which decreases progressively from the horizontal meridian to the top or bottom of the contact lens along each of the vertical meridian and lines parallel to the vertical meridian.
    • 本发明提供一种隐形眼镜,其具有不提供棱镜光学变形并且可以保持透镜在眼睛上的预定取向的取向特征。 本发明的隐形眼镜包括前表面和相对的后表面。 前表面包括垂直子午线,水平子午线,中心光学区域,从中心光学区域向外延伸的混合区域,围绕混合区域的周边区域以及与外围区域相切并相切的边缘区域。 混合区的存在确保了周边区域,混合区域和中心光学区域彼此相切。 周边区域具有与后表面组合的表面,在外围区域中提供透镜厚度,其特征在于(1)通过沿着每个垂直子午线从透镜的顶部逐渐增加的透镜厚度逐渐增加 以及平行于垂直子午线的直线,直到在光学区域和边缘区域之间的位置达到最大值,然后减小到边缘区域的边缘; 或(2)通过在水平子午线周围的区域中具有基本恒定的厚度并且具有从水平子午线逐渐减小到顶部或底部的厚度相对于穿过垂直子午线的平面具有镜像对称性 的每个垂直子午线和平行于垂直子午线的线。
    • 12. 发明申请
    • Method of manufacturing a contact lens
    • 隐形眼镜的制造方法
    • US20060055876A1
    • 2006-03-16
    • US10522443
    • 2003-07-23
    • William HallJoseph LindacherGiberto HernandezNelson BaityDonald McKillop
    • William HallJoseph LindacherGiberto HernandezNelson BaityDonald McKillop
    • G02C7/02
    • G02C7/024B29D11/00038G02B3/00G02C7/04G02C7/048
    • The present invention provides a method for converting a desired lens design to a geometry of a contact lens, preferably a customized contact lens or a contact lens having a complex surface design, to be produced in a computer-controlled manufacturing system. The method comprises: providing a lens design of a contact lens having a central axis, an anterior surface and an opposite posterior surface; projecting a predetermined number of points within a predetermined surface tolerance onto a surface of the lens design along each of a desired number of evenly-spaced semi-diameter spokes, each spoke radiating outwardly from the central axis; and for each of the spokes, generating a semi-meridian which is continuous in first derivative and includes a series of arcs and optionally straight lines, wherein each arc is defined by fitting at least three consecutive points into a spherical mathematical function within a desired concentricity tolerance, wherein each of the straight lines is obtained by connecting at least three consecutive points.
    • 本发明提供了一种用于将期望的透镜设计转换成在计算机控制的制造系统中产生的隐形眼镜,优选具有复杂表面设计的定制隐形眼镜或隐形眼镜的几何形状的方法。 该方法包括:提供具有中心轴线,前表面和相对后表面的隐形眼镜的透镜设计; 将预定表面公差内的预定数量的点沿所需数量的均匀间隔开的半直径轮辐中的每一个将透镜设计的表面投影到每个轮辐上,每个轮辐从中心轴线向外辐射; 并且对于每个轮辐,产生连续的一阶导数的半子午线,并且包括一系列弧和任选的直线,其中每个弧通过将至少三个连续的点拟合成期望的同心度内的球形数学函数 公差,其中通过连接至少三个连续点来获得每条直线。