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    PROGRESSIVE MULTIFOCAL OPHTHALMIC LENS WITH FAST POWER VARIATION
    71.
    发明专利
    PROGRESSIVE MULTIFOCAL OPHTHALMIC LENS WITH FAST POWER VARIATION 未知

    公开(公告)号：CA2436336C

    公开(公告)日：2009-10-06

    申请号：CA2436336

    申请日：2002-02-01

    Applicant: ESSILOR INT

    Inventor： AHSBAHS FRANCOISE ,  DEVIE PIERRE

    IPC: G02C7/06 ,  A61F2/16 ,  G02C7/02

    Abstract: The invention relates to a progressive multifocal ophthalmic lens having a f ar vision region, an intermediate vision region and a near vision region, a main meridian of progression passing through said three regions, and a power addition equal to a differen ce in mean sphere between a near vision region control point and a far vision region control point. The lens has a progression length less than 12 mm, defined as the vertical distance betwe en a mounting center and a point on the meridian where mean sphere is greater than mean sphere at the far vision control point by 85% of the power addition value. To ensure excellent optical performance of the lens despite this short length of progression, the ratio between the product of cylinder times the norm of sphere gradient, and the square of power addition is less than 0.08 mm-1 at every point within a 40 mm diameter disc centered on the center of the lens. Additionally, cylinder within that part of the disc situated above the mounting center is less than 0.5 times power addition. These features ensure optical performances of the lens, despite the low valu e of the progression length.

    LENTE OFTALMICA MULTIFOCAL PROGRESIVA CON VARIACION DE POTENCIA RAPIDA.
    74.
    发明专利
    LENTE OFTALMICA MULTIFOCAL PROGRESIVA CON VARIACION DE POTENCIA RAPIDA. 未知

    公开(公告)号：ES2263766T3

    公开(公告)日：2006-12-16

    申请号：ES02701383

    申请日：2002-02-01

    Applicant: ESSILOR INT

    Inventor： AHSBAHS FRANCOISE ,  DEVIE PIERRE

    IPC: G02C7/02 ,  G02C7/06

    Abstract: Una lente oftálmica multifocal progresiva, que comprende una superficie asférica con en todo punto una esfera media (S) y un cilindro (C), una zona de visión de lejos, una zona de visión intermedia y una zona de visión de cerca, un meridiano principal de progresión que atraviesa estas tres zonas, una adición igual a la diferencia de esfera media entre un punto de referencia de la zona de visión de cerca y un punto de referencia de la zona de visión de lejos, una longitud de progresión inferior a 12 mm, la longitud de progresión siendo igual a la distancia vertical entre una cruz de montaje y el punto del meridiano en el que la esfera media es superior a 85% de la adición en la esfera en el punto de referencia para la visión de lejos, caracterizada porque la relación entre - el producto del cilindro por la norma del gradiente de la esfera, por una parte y - el cuadrado de la adición por otra parte, es inferior a 0, 08 mm-1 en cualquier punto de un disco de 40 mm de diámetro centrado en el centro geométrico de la lente, y porque el cilindro en la parte del disco situada por encima de una cruz de montaje es inferior a 0, 5 veces la adición.

    75.
    发明专利
    未知

    公开(公告)号：FR2850763A1

    公开(公告)日：2004-08-06

    申请号：FR0301185

    申请日：2003-02-03

    Applicant: ESSILOR INT

    Inventor： POULAIN ISABELLE ,  DROBE BJORN ,  HARO CLOTILDE ,  ALLIONE PASCAL ,  AHSBAHS FRANCOISE

    IPC: G02C7/02 ,  G02C7/06

    Abstract: The lens presents horizontal prismatic refractive power that varies progressively along the main progression meridian (MM') with the addition of horizontal prismatic power being greater than 2 prismatic diopters in absolute value, this addition of horizontal prismatic power being defined by the difference between the horizontal prismatic refractive power at the reference point (L) of the far vision zone and the horizontal prismatic refractive power at the projection point (P') of the reference point (P) of the near vision zone (VP) on the vertical line passing through the reference point (L) of the far vision zone.

    78.
    发明专利
    未知

    公开(公告)号：DE69615900T2

    公开(公告)日：2002-04-25

    申请号：DE69615900

    申请日：1996-04-05

    Applicant: ESSILOR INT

    Inventor： AHSBAHS FRANCOISE ,  BAUDART THIERRY ,  LE SAUX GILLES

    IPC: G02C7/06 ,  G02C7/02

    Abstract: The lens has an aspherical surface (S) with a distant vision zone (VL), a close vision zone (VP) and an intermediate vision zone (VI), with a main progression meridian (MM') passing through the three zones. The three vision zones (VL, VP, VI) are separated by isocylindrical lines, and the distant vision zone has a sector angle of at least 145 degrees. A line bisecting the angle forms an angle of less than 5 degrees, and pref under 2 degrees with a vertical.

    79.
    发明专利
    未知

    公开(公告)号：DE69615900D1

    公开(公告)日：2001-11-22

    申请号：DE69615900

    申请日：1996-04-05

    Applicant: ESSILOR INT

    Inventor： AHSBAHS FRANCOISE ,  BAUDART THIERRY ,  LE SAUX GILLES

    IPC: G02C7/06 ,  G02C7/02

    Abstract: The lens has an aspherical surface (S) with a distant vision zone (VL), a close vision zone (VP) and an intermediate vision zone (VI), with a main progression meridian (MM') passing through the three zones. The three vision zones (VL, VP, VI) are separated by isocylindrical lines, and the distant vision zone has a sector angle of at least 145 degrees. A line bisecting the angle forms an angle of less than 5 degrees, and pref under 2 degrees with a vertical.

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