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1. 发明申请

WO2014001491A1 A PROCESS FOR DETERMINING A PAIR OF PROGRESSIVE OPHTHALMIC LENSES 审中-公开
标题翻译：一种确定渐进性眼镜镜片的方法
公开(公告)号：WO2014001491A1
公开(公告)日：2014-01-03
申请号：PCT/EP2013/063603
申请日：2013-06-28
申请人： ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
发明人： DROBE, Björn , NG HWEI KIEN, Paulyn , CONTET, Aude
IPC分类号： G02C7/02 , G02C7/06
CPC分类号： G02C7/027 , G02C7/022 , G02C7/063
摘要： The process comprises: determining prescribed far vision mean power and addition for each lens of the pair; determining a reading direction for the 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 reading direction determined for the wearer.
摘要翻译：该过程包括：确定所述对的每个镜片的规定的远视平均功率和加法; 确定佩戴者的阅读方向; 在该对的每个透镜上限定颞侧和鼻侧; 在每个透镜被佩戴并且对于每个注视方向，限定出所产生的散光的屈光力和模块，每个注视方向对应于下降角度和方位角; 为该对中的每个透镜定义近视目视方向; 对于该对的每个透镜，定义作为屈光力达到的透镜的时间侧上的邻近视线注视方向和注视方向之间的恒定降低角度的角距离的折射力的时间半宽度场规定的远视力的平均值加上规定的加法的四分之三; 对于该对中的每个透镜，将折射光焦度的鼻半宽域作为恒定降低角度处的角距离，在近视目标方向和屈光力达到的透镜鼻侧上的视线方向之间规定的远视力的平均值加上规定的加法的四分之三; 为所述对的每个透镜限定所得到的散光的模块的时间半宽度场，作为在所述透镜的时间侧上的近视视野方向和注视方向之间的恒定降低角度处的角距离，其中所述模块产生的散光达到规定加法的四分之一的价值; 并且对于该对的每个透镜，限定所得到的散光的模块的鼻半宽域作为恒定降低角度处的角距离，其在近视视野方向和透镜鼻侧上的注视方向之间，其中产生散光的模块达到规定加法的四分之一的值。对于每个透镜的屈光度的时间和鼻部半宽度场的总和和/或差异与所得散光的模块的时间和鼻部半宽度场之和的总和的比率确定基于为佩戴者确定的阅读方向。

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