41.
    发明专利
    未知

    公开(公告)号:FR2881846B1

    公开(公告)日:2007-05-11

    申请号:FR0501245

    申请日:2005-02-08

    Applicant: ESSILOR INT

    Inventor: GUILLOUX CYRIL

    Abstract: A method for defining a supplementary face for spectacles (or clip-on), comprising the steps of: i) choice of a lens suited to the wearer's prescription; ii) modelization of the position of the chosen lens and of the position of a supplementary face in front of the chosen lens; iii) choice of an optical function for the assembly of the chosen lens and supplementary face; iv) calculation of the characteristics of the supplementary face by optical optimization for a standard wearer, using the chosen optical function as optimization target. A supplementary face for spectacles, having: i) a detachable mounting device, suited to the detachable mounting of the supplementary face in front of a lens mounted in the spectacles; ii) a surface at least equal to the surface of the lens and iii) a continuous optical power variation over this surface.

    OPHTHALMIC LENS
    42.
    发明专利

    公开(公告)号:CA2614910A1

    公开(公告)日:2007-01-18

    申请号:CA2614910

    申请日:2006-07-06

    Applicant: ESSILOR INT

    Abstract: An ophthalmic lens has a complex surface with a fitting cross, a progression meridian having a power addition greater than or equal to 1.5 diopters between far vision and near vision reference points. The complex surface has within a circle of radius 20 mm centred on the geometrical centre of the lens, a cylinder value normalized to the addition of less than 0.8, and a rebound of the sphere quantity normalized to the addition of less than 0.04 on said circle. The surface also has a progression length less than or equal to 14 mm, defined as the vertical distance between the fitting cross and the point on the meridian for which the mean sphere reaches 85% of the addition. The lens is suited to hypermetropic wearers with a good perceptual comfort in peripheral vision and good accessibility in near vision.

    LENS ELEMENT
    44.
    发明专利

    公开(公告)号:CA3092418A1

    公开(公告)日:2019-09-06

    申请号:CA3092418

    申请日:2019-03-01

    Applicant: ESSILOR INT

    Abstract: A lens element intended to be worn in front of an eye of a person comprising: - a prescription portion having a first refractive power based on a prescription for correcting an abnormal refraction of said eye of the person and a second refractive power different from the first refractive power; - a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye so as to slow down the progression of the abnormal refraction of the eye.

    METHOD FOR THE DETERMINATION OF A PROGRESSIVE OPHTHALMIC LENS

    公开(公告)号:CA2580213C

    公开(公告)日:2015-02-24

    申请号:CA2580213

    申请日:2007-03-01

    Applicant: ESSILOR INT

    Abstract: A method for the determination by optical optimization of a personalized progressive ophthalmic lens intended to be inserted into a frame chosen by a given wearer for whom a power addition has been prescribed in near vision, the method comprising the stages of: - measuring parameters representing the frame chosen by the wearer; - choosing an initial distribution of power and resulting astigmatism defect targets for each direction of viewing under wearing conditions in an ordinary frame; - calculating transformation coefficients using the measured parameters representing the chosen frame and standard parameters; - calculating a personalized distribution of the power and resulting astigmatism defect targets on the lens by applying the calculated transformation coefficients to the initial distribution. The method makes it possible to retain the proportion of the distribution between the far-vision, near-vision and intermediate-vision zones whatever the size and the shape of the frame chosen.

    AN OPTICAL FUNCTION DETERMINING METHOD

    公开(公告)号:CA2776967A1

    公开(公告)日:2011-04-14

    申请号:CA2776967

    申请日:2010-10-07

    Applicant: ESSILOR INT

    Abstract: A method implemented by computer means for determining a virtual wearer-ophthalmic lens-ergorama system associated with an optical function of an ophthalmic lens for a given wearer, comprising: a prescription data providing step, an optical reference surface data providing step, a virtual wearer-ophthalmic lens-ergorama system determining step, a criteria selecting step, a target value defining step, an evaluation step, and a modification step, in which at least one parameter of the virtual wearer-ophthalmic lens-ergorama system different from the base curve of the ophthalmic lens is modified, in order to minimize the difference between the target value and the evaluation criterion value.

    50.
    发明专利
    未知

    公开(公告)号:BRPI0621494A2

    公开(公告)日:2009-03-10

    申请号:BRPI0621494

    申请日:2006-07-06

    Applicant: ESSILOR INT

    Abstract: The lens has a complex surface having a cylinder value normalized to the addition of less than 0.8 in a circle of radius 20mm with respect to the center of lens. The rebound in the sphere quantity normalized to the addition on the circle is less than 0.04, and the progression length defined between fitting cross and a point on the meridian at which the mean sphere reaches 85% of progression of the addition, is 14mm or less. Independent claims are also included for the following: (1) method for correcting vision of presbyopic subject; and (2) method for fitting ophthalmic lens in visual equipment.

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