AN OPHTHALMIC PROGRESSIVE ADDITION LENS FOR A MYOPIC AND PRESBYOPIC WEARER; METHOD FOR PROVIDING SUCH A LENS

    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

    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).

    METHOD FOR PRODUCING A CUSTOMIZED PROGRESSIVE OPHTHALMIC LENS

    公开(公告)号:CA2943861A1

    公开(公告)日:2015-10-08

    申请号:CA2943861

    申请日:2015-03-31

    Abstract: A method for producing a customized progressive ophthalmic lens intended for a wearer having a prescription for a wearer's eye corresponding to said lens, the method comprising the following steps: a) providing an initial progressive ophthalmic lens design having a meridian line; b) providing binocular convergence data for the wearer; and c) modifying the initial design so that the meridian line is laterally shifted in position with respect to said initial design, for matching the convergence data provided at step b), for said prescription, and the modified design as resulting from step c) is used for the customized lens, wherein step b) comprises the following substeps: b1 ) providing a visual stimulus in a sagittal plane of the wearer; and b2) moving the visual stimulus within the sagittal plane between a predetermined maximum distance and a predetermined minimum distance.

    A METHOD IMPLEMENTED BY COMPUTER MEANS FOR CALCULATING A LENS OPTICAL SYSTEM OF A SPECTACLE OPHTHALMIC LENS FOR A WEARER

    公开(公告)号:CA2968454A1

    公开(公告)日:2016-06-16

    申请号:CA2968454

    申请日:2015-12-08

    Applicant: ESSILOR INT

    Abstract: A method implemented by computer means for calculating a lens optical system (OS) of a spectacle ophthalmic lens for a wearer, wherein the method comprises the steps of: providing an aberration target lens (ATL) fulfilling the requirements of: · a first set of aberration data of the aberration target lens (ATL), · a first set of wearing parameters of the aberration target lens (ATL), and · a first set of lens parameters of the aberration target lens (ATL); providing a distortion target (DT) consisting of target distortion values where the target distortion values are reduced or enhanced in at least a modified distortions zone when compared to the distortion values of the aberration target lens (ATL); calculating the lens optical system (OS) by using an optimization method which jointly uses the aberration target lens and the target distortion values.

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