公开(公告)号：CA2830638C

公开(公告)日：2018-07-24

申请号：CA2830638

申请日：2012-03-22

Applicant: ESSILOR INT

Inventor： DE ROSSI HELENE ,  MOINE JEROME ,  REGO CARLOS ,  GUILLOT MATTHIEU

IPC: G02C7/02

Abstract: The invention relates to a progressive ophthalmic lens comprising a front surface and a rear surface, each surface having in each point an altitude, a mean sphere value and a cylinder value, the front surface of the lens comprising: - a far vision zone having a far vision reference point; - a near vision zone having a near vision reference point; - a main meridian, wherein the front surface is regressive and has: - a sphere gradient normalized value of less than 7.50.10-1 mm-1 at any point in a central portion of the lens including a portion of the main meridian (32), the far vision reference point (FV) and the near vision reference point (NV); - a cylinder gradient normalized value of less than 1.45 mm-1 at any point in the central portion of the lens.

公开(公告)号：FR2938934B1

公开(公告)日：2017-07-07

申请号：FR0857979

申请日：2008-11-25

Applicant: ESSILOR INT - CIE GENERALE D'OPTIQUE

Inventor： GUILLOT MATTHIEU ,  VIDEMANN ANTOINE ,  ROUSSEAU BENJAMIN

IPC: G02C7/02 ,  G02B27/01

公开(公告)号：AU2012351474B2

公开(公告)日：2016-02-25

申请号：AU2012351474

申请日：2012-12-17

Applicant: ESSILOR INT

Inventor： GUILLOT MATTHIEU ,  REGO CARLOS ,  DE ROSSI HELENE

IPC: G02C7/02 ,  G02C7/06

Abstract: The invention relates to a method for determining a progressive ophthalmic lens, comprising: - determining a first intermediate value of regression (d1) as the strongest regression that can be applied on the front surface of the lens while keeping a mean sphere value in at least a portion of the lower part of the rear surface of the lens less or equal to a first predetermined value (V1); - determining a second intermediate value of regression (d2) as the strongest regression that can be applied on the front surface of the lens while keeping a mean sphere value in at least a portion of the lower part of the front surface of the lens superior or equal to a second predetermined value (V2); - determining a third intermediate value of regression (d3) as the strongest regression that can be applied on the front surface of the lens while keeping an addition on the rear surface of the lens less or equal to a third predetermined value (V3); - determining a value of regression (d) for the front surface as the maximum value among the first, second and third intermediate values of regression.