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    • 9. 发明授权
    • Aspheric toric lens designs
    • 非球面复曲面透镜设计
    • US5796462A
    • 1998-08-18
    • US708362
    • 1996-09-04
    • Jeffrey H. RoffmanEdgar V. Menezes
    • Jeffrey H. RoffmanEdgar V. Menezes
    • G02C7/02B29D11/00G02B3/06G02B13/00G02B13/18G02C7/04A61F2/16
    • A61F2/1613G02C7/044G02C2202/02
    • Aspheric toric lens designs are disclosed which reduce the number of cylindrical axis locations required for stock keeping units in inventory by aspherizing the toric surface thereof. The present invention pertains to ophthalmic lenses, and in particular to contact lenses such as soft hydrogel contact lenses, particularly designed to fit astigmatic patients who are either non-presbyopic or presbyopic. One of the front and back surfaces of the aspheric toric lens defines a spherical surface corresponding at least to the patient's basic distance prescription Rx. The other of the front and back surfaces defines an aspheric toric curve, wherein the toric surface is constructed with aspheric radii, such that the aspheric curve desensitizes axial misalignment of the toric curve by providing an enhanced depth-of-focus. When the aspheric toric surface is on the back surface of the lens, the spherical curve on the front surface of the lens can comprise a single spherical curve corresponding to the patient's basic distance prescription Rx. When the aspheric toric curve is on the front surface of the lens, the spherical curve on the back surface of the lens can comprise a multifocus concentric annular ring spherical surface design.
    • 公开了非球面复曲面透镜设计,其减少库存中的库存单元所需的圆柱形轴位置的数量,其通过使其复曲面进行非球面化。 本发明涉及眼用镜片,特别是涉及隐形眼镜,例如软水凝胶隐形眼镜,特别设计用于适合非老花眼或老花眼的散光患者。 非球面复曲面透镜的前表面和背面中的一个限定了至少对应于患者的基本距离处方Rx的球面。 前表面和后表面中的另一个限定非球面复曲面曲线,其中复曲面表面构造有非球面半径,使得非球面曲线通过提供增强的聚焦深度使得复曲面曲线的轴向未对准脱敏。 当非球面复曲面位于透镜的后表面上时,透镜前表面上的球形曲线可以包括对应于患者的基本距离处方Rx的单个球形曲线。 当非球面复曲面曲线在透镜的前表面上时,透镜后表面上的球形曲线可以包括多焦点同心环形球形球面设计。