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公开(公告)号：EP0741313A3
公开(公告)日：1998-11-11
申请号：EP96303127
申请日：1996-05-03
IPC分类号： G02C7/04
摘要： Non-ballasted, eyelid rotationally stabilized designs are disclosed for use in toric or multifocal toric contact lenses. The back surface of the lens includes a toric or multifocal toric surface and also thin top and bottom zones (slab offs) to achieve eyelid rotational orientation and stabilization. The advantage of this technical approach is in mold manufacturing, wherein the design allows the use of any chosen power spherical stock front mold.
摘要翻译： 公开了用于复曲面或多焦点复曲面隐形眼镜的非镇静，眼睑旋转稳定设计。 镜片的后表面包括复曲面或多焦点复曲面以及薄的顶部和底部区域（平板偏离）以实现眼睑旋转定向和稳定。 这种技术方法的优点是在模具制造中，其中该设计允许使用任何选择的动力球形坯料前模具。
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公开(公告)号：EP0742462A3
公开(公告)日：1998-11-04
申请号：EP96303123
申请日：1996-05-03
IPC分类号： G02C7/02 , G02C7/04 , G05B19/4097
摘要： Programmable smooth junctions are provided for lenses and molds therefor, particularly for toric lens designs, which enable a numerically controlled (NC) machine to be programmed to machine smooth junctions or transitions between adjacent regions of a lens which have different thicknesses or radii of curvature. First and second mathematical functions f(a) and f(b) are defined which specify the curves of first and second segments of a lens surface. The slope dy/dx is derived of the first and second mathematical functions f(a) and f(b) at the transition between the first and second segments of the lens surface. A mathematical function is defined which describes a desired transition between the first and second segments of the lens. The first and second mathematical functions f(a) and f(b), the derived slopes dy/dx of the first and second mathematical functions f(a) and f(b), and the mathematical function describing the desired transition are then utilized to program a numerically controlled machine to machine the first and second segments of the lens surface and the desired transition between the first and second segments.
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公开(公告)号：EP0742465A3
公开(公告)日：1998-11-04
申请号：EP96303130
申请日：1996-05-03
摘要： Combined multifocal toric lens designs are disclosed which combine a correction for astigmatism, either corneal or lenticular, with a correction for presbyopia. One of the front and back surfaces of the lens defines a toric surface for an astigmatic optical correction, and one of the front and back surfaces, which can be the same surface or the opposite surface, defines a multifocal surface for a presbyopic optical correction, to provide visual acuity for astigmatic presbyopes. Embodiments are disclosed wherein one surface of the lens design has a combined concentric annular ring, multifocal toric surface, and the other surface of the lens design has a spherical or aspherical surface. In other embodiments, one surface of the lens design has a toric surface for a toric correction, and the other surface of the lens design has a multifocal surface to provide a presbyopic correction, which may include concentric annular ring multifocal lens designs, or other presbyopic lens designs which contain more than one spherical or aspherical power such as aspheres, segments, progressive aspheres, diffractive, birefringent or other concentrics.
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