METHOD FOR DETERMINING AN OPHTHALMIC LENS ADAPTED FOR CORRECTING AN ABNORMAL REFRACTION OF AN EYE OF A WEARER

    公开(公告)号:CA3119872A1

    公开(公告)日:2020-05-22

    申请号:CA3119872

    申请日:2019-11-14

    Applicant: ESSILOR INT

    Abstract: Method for determining an ophthalmic lens adapted for correcting an abnormal refraction of an eye of a wearer, and comprising optical elements placed on a surface of said ophthalmic lens so as to prevent a progression of the abnormal refraction of the eye of the wearer, the method comprising: - providing prescription data adapted at least for correcting the abnormal refraction of the eye of the wearer; - providing an abnormal refraction parameter relating to the abnormal refraction of an eye of the wearer; - providing a sensitivity parameter representing the variation of sensitivity of the wearer as a function of at least one parameter of the optical elements; - determining a value of a parameter of the optical elements adapted for the wearer based on the abnormal refraction parameter and the sensitivity parameter: - determining an ophthalmic lens based at least on the prescription data and the value of the parameter of the optical elements adapted for the wearer.

    A PROCESS FOR DETERMINING A PAIR OF PROGRESSIVE OPHTHALMIC LENSES

    公开(公告)号:IN2460MUN2014A

    公开(公告)日:2015-07-10

    申请号:IN2460MUN2014

    申请日:2014-12-03

    Applicant: ESSILOR INT

    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.

    METHOD FOR DETERMINING AN OPHTHALMIC LENS ADAPTED FOR CORRECTING AN ABNORMAL REFRACTION OF AN EYE OF A WEARER

    公开(公告)号:SG11202104846WA

    公开(公告)日:2021-06-29

    申请号:SG11202104846W

    申请日:2019-11-14

    Applicant: ESSILOR INT

    Abstract: A method is provided for determining an ophthalmic lens configured to correct an abnormal refraction of an eye of a wearer and including at least three optical elements disposed on a surface of the ophthalmic lens to suppress or reduce a progression of the abnormal refraction of the eye, the method including providing prescription data configured to correct the abnormal refraction; providing at least one abnormal refraction parameter relating to the abnormal refraction; providing at least one sensitivity parameter representing a variation of sensitivity of the wearer as a function of at least one parameter of the optical elements; determining a value of the at least one parameter of the optical elements configured for the wearer based on the abnormal refraction parameter and the sensitivity parameter; and determining the ophthalmic lens based at least on the provided prescription data and the value of the parameter of the optical elements.

    LENTILLE OPHTALMIQUE MULTIFOCALE PROGRESSIVE

    公开(公告)号:FR2956222A1

    公开(公告)日:2011-08-12

    申请号:FR1050896

    申请日:2010-02-09

    Applicant: ESSILOR INT

    Abstract: L'invention se rapporte à une lentille présentant certaines propriétés dont : - un cercle regroupant l'ensemble des points de la lentille ayant la même abscisse et la même ordonnée que des points situés sur un cercle dans le plan du repère, de diamètre 35 millimètres et centré sur un point situé 8,5 millimètres en dessous de la croix de montage et décalé horizontalement du côté nasal de 1,25 millimètre, - un disque regroupant l'ensemble des points de la lentille ayant la même abscisse et la même ordonnée que des points situés à l'intérieur dudit cercle, - une longueur de progression inférieure à 14,5 millimètres, - une différence de rapport entre la valeur de cylindre et l'addition surfacique inférieure à 0,2 en valeur absolue pour tout couple de points de la lentille symétriques par rapport à la croix de montage et ayant la même ordonnée que la croix de montage, et une abscisse inférieure à 20 millimètres en valeur absolue - un premier rapport entre : - la valeur maximale de cylindre pour l'ensemble des points du cercle et - l'addition surfacique inférieur à 0,7; et - un deuxième rapport entre : - la valeur maximale de cylindre pour l'ensemble des points du disque et - l'addition surfacique inférieur ou égal à 1,05. L'invention permet d'améliorer le confort du porteur.

    METHOD AND APPARATUS FOR EVALUATING EFFICACY OF OPHTHALMIC LENS IN CONTROLLING SIGHTEDNESS IMPAIRMENT

    公开(公告)号:SG11202104593TA

    公开(公告)日:2021-06-29

    申请号:SG11202104593T

    申请日:2019-12-11

    Applicant: ESSILOR INT

    Abstract: A method to select or to conceive/design lenses is provided. The method may be applied to lenses having effect of myopia control, visual fatigue relief, etc. In one aspect, a predictive model that ranks myopia control solutions according to visual, behavioral, and biometric parameter is provided. The predictive model may be built based on the myopic eye characteristics, the behavior of the wearers, and the defocus induced by the myopia control solution. In another aspect, a method, a computer-readable medium, and an apparatus for evaluating the efficacy of an ophthalmic lens in controlling at least one sightedness impairment (e.g., myopia) of at least one wearer of the ophthalmic lens are provided. The apparatus may determine, based on a predetermined relationship model, the efficacy of the ophthalmic lens for at least one wearer from representative data corresponding to the at least one wearer.

    A PROCESS FOR DETERMINING A PAIR OF PROGRESSIVE OPHTHALMIC LENSES

    公开(公告)号:CA2873522C

    公开(公告)日:2020-08-25

    申请号:CA2873522

    申请日:2013-06-28

    Applicant: ESSILOR INT

    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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