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CN104380178A 用于确定一副渐进式眼镜片的方法 有权 转让

用于确定一副渐进式眼镜片的方法
摘要：
该方法包括：为该副镜片中的每个镜片确定处方远视觉平均屈光力和下加光；确定佩戴者的偏侧性；在该副镜片中的每个镜片上定义一个颞侧和一个鼻侧；在被佩戴的每个镜片上以及针对每个注视方向，定义一个屈光力和一个结果散光模数，每个注视方向对应于一个降低角和一个方位角；为该副镜片中的每个镜片定义一个近视觉注视方向；为该副镜片中的每个镜片定义屈光力的一个颞半宽域，作为该近视觉注视方向与该镜片的颞侧上的注视方向之间的恒定降低角处的角距离，在该镜片的颞侧上的注视方向上屈光力达到该处方远视觉平均屈光力加上该处方下加光的四分之三的值；为该副镜片中的每个镜片定义屈光力的一个鼻半宽域，作为该近视觉注视方向与该镜片的颞侧上的注视方向之间的恒定降低角处的角距离，在该镜片的鼻侧上的注视方向上屈光力达到该处方远视觉平均屈光力加上该处方下加光的四分之三的值；为该副镜片中的每个镜片定义结果散光模数的一个颞半宽域作为该近视觉注视方向与该镜片的颞侧上的注视方向之间的恒定降低角处的角距离，在该镜片的颞侧上的注视方向上结果散光模数达到该处方下加光的四分之一的值；并且为该副镜片中的每个镜片定义结果散光模数的一个鼻半宽域，作为该近视觉注视方向与该镜片的鼻侧上的注视方向之间的恒定降低角处的角距离，在该镜片的鼻侧上的注视方向上结果散光模数达到该处方下加光的四分之一的值。基于佩戴者的偏侧性，为该副镜片中的每个镜片确定屈光力的颞和鼻半宽域的总和的差的比值和/或结果散光模数的颞和鼻半宽域的总和的差的比值。
摘要（英）：

The process comprises: determining prescribed far vision mean power and addition for each lens of the pair; determining laterality of a wearer; defining a temporal side and a nasal side on each lens of the pair; defining, on each lens being worn and for each gaze direction, a refractive power and a module of resulting astigmatism, each gaze direction corresponding to a lowering angle and to an azimuth angle; defining a proximate vision gaze direction for each lens of the pair; defining, for each lens of the pair, a temporal half-width field of refractive power as the angular distance, at constant lowering angle, between the proximate vision gaze direction and a gaze direction on the temporal side of the lens where the refractive power reaches the value of the prescribed far vision mean power plus three quarters of the prescribed addition; defining, for each lens of the pair, a nasal half-width field of refractive power as the angular distance, at constant lowering angle, between the proximate vision gaze direction and a gaze direction on the nasal side of the lens where the refractive power reaches the value of the prescribed far vision mean power plus three quarters of the prescribed addition; defining, for each lens of the pair, a temporal half-width field of module of resulting astigmatism as the angular distance, at constant lowering angle, between the proximate vision gaze direction and a gaze direction on the temporal side of the lens where the module of resulting astigmatism reaches the value of one quarter of the prescribed addition; and defining, for each lens of the pair, a nasal half-width field of module of resulting astigmatism as the angular distance, at constant lowering angle, between the proximate vision gaze direction and a gaze direction on the nasal side of the lens where the module of resulting astigmatism reaches the value of one quarter of the prescribed addition. The ratio of the difference over the sum of temporal and nasal half-width fields of refractive power and/or the ratio of the difference over the sum of temporal and nasal half-width fields of module of resulting astigmatism are determined for each lens of the pair based on the laterality of the wearer.

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