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    AN OPHTHALMIC PROGRESSIVE ADDITION LENS FOR A MYOPIC AND PRESBYOPIC WEARER; METHOD FOR PROVIDING SUCH A LENS
    57.
    发明专利
    AN OPHTHALMIC PROGRESSIVE ADDITION LENS FOR A MYOPIC AND PRESBYOPIC WEARER; METHOD FOR PROVIDING SUCH A LENS 未知

    公开(公告)号：CA3001635A1

    公开(公告)日：2017-04-20

    申请号：CA3001635

    申请日：2016-10-11

    Applicant: ESSILOR INT

    Inventor： ROUSSEAU BENJAMIN ,  HESLOUIS MELANIE ,  FRICKER SEBASTIEN

    IPC: G02C7/02 ,  G02C7/06

    Abstract: An ophthalmic progressive addition lens for a myopic and presbyopic wearer; method for providing such a lens. An ophthalmic progressive addition lens for a myopic and presbyopic wearer having a mean refractive power, PPO(a, ß), a module of resulting astigmatism, ASR(a, ß), an acuity loss value ACU(a, ß), where said (a, ß) functions are determined in as-worn conditions of the lens by the wearer, and a first acuity criterion, AcuityCriterion1 which fulfils following requirement: AcuityCriterion1 = 1340 D .deg , and where: AcuityCriterion1 is defined as a combination of PPO(a, ß), ASR(a, ß), ADDp, and ACU(a, ß).

    A process for determining a pair of progressive ophthalmic lenses
    58.
    发明专利
    A process for determining a pair of progressive ophthalmic lenses 未知

    公开(公告)号：AU2013283260B2

    公开(公告)日：2016-06-16

    申请号：AU2013283260

    申请日：2013-06-28

    Applicant: ESSILOR INT

    Inventor： PAILLE DAMIEN ,  ROUSSEAU BENJAMIN ,  CONTET AUDE ,  POULAIN ISABELLE ,  VIALET STEPHANIE ,  KARIOTY FARID

    IPC: G02C7/02 ,  G02C7/06

    Abstract: 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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