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公开(公告)号：US5812238A
公开(公告)日：1998-09-22
申请号：US833630
申请日：1997-04-08
摘要： In a pair of progressive multifocal ophthalmic lenses, in which each lens has an aspherical surface comprising a far vision portion, a near vision portion, an intermediate vision portion, and a prime meridian of power progression passing through these three portions, the prime meridians of progression of the lenses are substantially symmetrical with respect to each other, and one of the lenses is more particularly dedicated to far vision and the other is more particularly dedicated to near vision, the lens dedicated to far vision having a more extensive far vision portion than the far vision portion of the lens dedicated to near vision, and the lens dedicated to far vision having a less extensive near vision portion than the near vision portion of the lens dedicated to near vision.
摘要翻译： 在一对渐进多焦点眼科镜片中，其中每个镜片具有非球面，其包括通过这三个部分的远视觉部分，近视觉部分，中间视觉部分和功率进展的初次子午线，主要子午线 透镜的进程相对于彼此基本对称，并且其中一个透镜更特别地专用于远视觉，另一个更特别地致力于近视，专用于远视的镜头具有比较远的视野部分更广泛的远视部分 专用于近视力的透镜的远视部分，以及专用于远视的透镜具有比专用于近视的镜片的近视觉部分不太广泛的近视部分。
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公开(公告)号：US4976534A
公开(公告)日：1990-12-11
申请号：US468282
申请日：1990-01-22
申请人： Christian Miege , Pierre Monteil , Gerard Obrecht
发明人： Christian Miege , Pierre Monteil , Gerard Obrecht
摘要： The proximity P of a simultaneous vision optical lens for correcting presbyopia is defined as the reciprocal of the distance D at which a light ray parallel to and at a distance h from its axis crosses the axis after passing through the lens. The curve representing the proximity P of the lens lies between a lower envelope curve P.sub.inf and an upper envelope curve P.sub.sup satisfying the following equations:P.sub.inf =f(h)=(.SIGMA.A'.sub.i h.sup.i)+P.sub.VLP.sub.sup =f(h)=(.SIGMA.A".sub.i h.sup.i)+P.sub.VLin which P.sub.VL is the proximity for distant vision and A'.sub.i, A".sub.i are numeric coefficients depending on the proximity addition added for near vision to the proximity for far vision. The lens may be implemented as a contact lens, an intra-ocular implant or an intra-corneal lens.
摘要翻译： 用于校正远视的同时视觉光学透镜的接近度P被定义为距离D的倒数，在该距离D处，与其轴线平行且距离h的光线穿过透镜后与轴线交叉。 表示透镜的接近P的曲线位于下包络线Pinf和满足以下等式的上包络线Psup之间：Pinf = f（h）=（SIGMA A'i hi）+ PVL Psup = f（h）= （SIGMA A'i hi）+ PVL，其中PVL是远视力的接近度，并且A'i，A'i是取决于为远视力的近距离附近的近距离附近的数值系数。 透镜可以实现为隐形眼镜，眼内植入物或角膜内透镜。
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公开(公告)号：US6102544A
公开(公告)日：2000-08-15
申请号：US342946
申请日：1999-06-29
摘要： In a multifocal ophthalmic lens comprising an aspherical surface having at every point thereon a mean sphere and a cylinder, a far vision region, a near vision region, and an intermediate vision region, the length of progression i.e. the length over which lens power varies by a set amount in different regions of the lens, is short. To avoid distortion at the periphery of the lens which this would otherwise occasion, the isosphere and isocylinder lines are distributed over the surface of the lens so as to ensure variations in sphere are not too sudden along a 20 mm radius circle centered on the geometric center of the lens and variations in cylinder on the surface of the lens inside this circle are also very small. The lens has an enlarged near vision region and progression is less perceptible to the wearer.
摘要翻译： 在包括非球面的多焦点眼镜片中，每个点上均具有平均球体和圆柱体，远视区域，近视区域和中间视觉区域，其进程长度即透镜功率变化的长度 在镜片的不同区域设定的量很短。 为了避免透镜外围的变形，否则会出现这种情况，同相和圆柱体线分布在透镜的表面上，以确保球体的变化不会沿着以几何中心为中心的20毫米半径圆 的透镜和该圆周内的透镜表面上的气缸的变化也非常小。 透镜具有放大的近视区域，并且进展对于佩戴者而言较不可察觉。
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公开(公告)号：US5488442A
公开(公告)日：1996-01-30
申请号：US154336
申请日：1993-11-18
摘要： A progressive multifocal ophthalmic lens is provided having an aspherical surface comprising a distance vision portion, a near vision portion and an intermediate vision portion, in which the maximum mean sphere gradient value is situated in the intermediate vision portion of the principal meridian of progression of the lens, and the cylinder gradient over the whole aspherical surface of the lens is less than the product obtained by multiplying the power addition value at each point by a constant value coefficient.
摘要翻译： 提供了一种渐进式多焦点眼科镜片，其具有包括距离视觉部分，近视觉部分和中间视觉部分的非球面，其中最大平均球面梯度值位于主要子午线的中间视线部分中 透镜的整个非球面上的圆柱体梯度小于通过将每个点处的功率相加值乘以恒定值系数而获得的乘积。
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