Method for determination of a pair of progressive ophthalmic lenses

    公开(公告)号:AU2005281634B2

    公开(公告)日:2010-09-30

    申请号:AU2005281634

    申请日:2005-08-05

    Applicant: ESSILOR INT

    Abstract: The invention relates to the determination of a pair of ophthalmic lenses, by measurement of the sagittal plane shift of the wearer for close vision with relation to the standard sagittal plane. Optimisation targets are then chosen as a function of the measured shift. The lenses are determined by optimisation with the chosen targets. Lenses are thus obtained with which the field of close vision is symmetrical with relation to the medial line as perceived by the wearer. A wearer with a displaced sagittal plane thus has a greater close vision field which facilitates binocular vision and increases acuity.

    SERIE DE LENTILLES OPHTALMIQUES PROGRESSIVES

    公开(公告)号:FR2928744A1

    公开(公告)日:2009-09-18

    申请号:FR0851582

    申请日:2008-03-11

    Applicant: ESSILOR INT

    Abstract: Une série de lentilles ophtalmiques progressives est proposée, qui est indexée par des valeurs d'addition de puissance optique de verres de lunettes à réaliser à partir de ces lentilles. Chaque lentille de la série détermine un écart supplémentaire entre une valeur de la puissance optique pour la direction de vision de près et une valeur maximale de la puissance optique qui est obtenue pour une direction de regard pointant en dessous de ladite direction de vision de près. Les lentilles de la série sont adaptées pour des postures de porteurs qui peuvent varier en fonction des valeurs d'addition de puissance optique.

    55.
    发明专利
    未知

    公开(公告)号:ES2163240T3

    公开(公告)日:2002-01-16

    申请号:ES98402532

    申请日:1998-10-13

    Applicant: ESSILOR INT

    Abstract: The lens has an aspherical surface with a geometrical center, a reference point for near vision, and a virtually umbilical and vertical meridian line with a mean spherical and cylindrical value at each point. The area formed by points at a distance of less than 20 mm from the geometrical center and with a cylindrical value of between 0.42 and 0.84 diopter is greater than the area formed by points at a distance of less than 20 mm from the geometrical center and with a cylindrical value of less than 0.42 diopter.

    Set of progressive multifocal ophthalmic lenses

    公开(公告)号:AU729511B2

    公开(公告)日:2001-02-01

    申请号:AU4212197

    申请日:1997-09-09

    Applicant: ESSILOR INT

    Abstract: The invention concerns a set of progressive multifocal opthalmic lenses, each having a first progressive multifocal surface and a second surface preferably spherical. It proposes to define the set of lenses with regard to the optical characteristics of the lenses, and particularly wearer power and oblique astigmatism, in worn conditions. For this purpose, the invention defines an ergorama associating with each sight direction in worn conditions a target object point, and a given power. This ergorama supplies a power target for a definition by optimisation of the lenses, and is used in a radii plotting programme for calculating the optical characteristics during optimisation. The set of lenses has substantially identical optical performances for a given addition, whatever the power of the far vision reference point.

    Progressive multifocal ophthalmic lens

    公开(公告)号:IE81058B1

    公开(公告)日:1999-12-29

    申请号:IE950799

    申请日:1995-10-13

    Applicant: ESSILOR INT

    Abstract: A progressive multifocal ophthalmic lens is provided having an aspherical surface with a mean sphere and a cylinder at every point. The aspherical surface has a distance vision portion, with a control point for distance vision, a near vision portion with a control point for near vision, and an intermediate vision portion between the near vision portion and the distance vision portion. A power addition value A is defined as a variation in mean sphere between the control point for distance vision and the control point for near vision portion. A base B is defined as a value of mean sphere at the control point for distance vision. A width of the near vision portion varies not only as a function of the power addition value A, but also as a function of the value B of the base. The invention thereby ensures the presence of a substantially constant object field for all values of the power addition and of the base.

    Ophthalmic lens
    58.
    发明专利

    公开(公告)号:AU8934498A

    公开(公告)日:1999-05-06

    申请号:AU8934498

    申请日:1998-10-15

    Applicant: ESSILOR INT

    Abstract: The lens has an aspherical surface with a geometrical center, a reference point for near vision, and a virtually umbilical and vertical meridian line with a mean spherical and cylindrical value at each point. The area formed by points at a distance of less than 20 mm from the geometrical center and with a cylindrical value of between 0.42 and 0.84 diopter is greater than the area formed by points at a distance of less than 20 mm from the geometrical center and with a cylindrical value of less than 0.42 diopter.

    JEU DE LENTILLES OPHTALMIQUES MULTIFOCALES PROGRESSIVES

    公开(公告)号:FR2753805B1

    公开(公告)日:1998-11-13

    申请号:FR9611478

    申请日:1996-09-20

    Applicant: ESSILOR INT

    Abstract: L'invention a pour objet un jeu de lentilles ophtalmiques multifocales progressives, présentant chacune une première surface multifocale progressive et une deuxième surface de préférence sphérique. Elle propose de définir le jeu de lentilles en considérant les caractéristiques optiques des lentilles, et notamment la puissance porteur et l'astigmatisme oblique, dans les conditions du porté. Pour cela, l'invention définit un ergorama associant à chaque direction du regard dans les conditions du porté un point objet visé, et une puissance donnée. Cet ergorama fournit une cible de puissance pour une définition par optimisation des lentilles, et est utilisé dans un programme de tracé de rayons pour calculer les caractéristiques optiques au cours de l'optimisation. Le jeu de lentilles selon l'invention présente des performances optiques sensiblement identiques pour une addition donnée, quelle que soit la puissance au point de référence de la vision de loin.

    Progressive multifocal ophthalmic lens

    公开(公告)号:GB2294553B

    公开(公告)日:1998-04-29

    申请号:GB9522051

    申请日:1995-10-27

    Applicant: ESSILOR INT

    Abstract: A progressive multifocal ophthalmic lens is provided having an aspherical surface with a mean sphere and a cylinder at every point. The aspherical surface has a distance vision portion, with a control point for distance vision, a near vision portion with a control point for near vision, and an intermediate vision portion between the near vision portion and the distance vision portion. A power addition value A is defined as a variation in mean sphere between the control point for distance vision and the control point for near vision portion. A base B is defined as a value of mean sphere at the control point for distance vision. A width of the near vision portion varies not only as a function of the power addition value A, but also as a function of the value B of the base. The invention thereby ensures the presence of a substantially constant object field for all values of the power addition and of the base.

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