Patent ID: 9513493
Filing Date: 2016-12-06
CPC Classification: G02C,G06Q

Claim Text:
1. A computer-implemented method for manufacturing a spectacle multifocal progressive ophthalmic lens intended to be worn by a wearer, wherein said wearer was issued a prescription containing prescription data, said method comprising: a step of providing data on the wearer's handedness, and a step of determining the ophthalmic lens, wherein the step for determining the ophthalmic lens takes into account the provided data on the wearer's handedness and is carried out by: an optical optimization that comprises: 1) a step of selecting an ergorama, 2) a step of defining a target optical function for said lens as a function of the wearer's prescription data, 3) a step of carrying out optimization by: wherein said ergorama selected in step 1) is handedness-dependent and/or the target optical function defined in step 2) is designed as a function of the wearer's handedness, and a step of manufacturing the ophthalmic lens based on the determined ophthalmic lens, wherein the step 2) of defining said target optical function comprises at least one step of: asymmetrizing as a function of the wearer's handedness the nasal/temporal field half-widths of one or more of the following: the near-vision zone with respect to a proximate-vision gaze direction, the intermediate-vision zone with respect to the meridian line, and the distant-vision zone with respect to a distant-vision gaze direction, or asymmetrizing at least one optical parameter of the target optical function between the nasal part and the temporal part of the lens as a function of the wearer's handedness, wherein said optical parameter is selected from: any one of central vision optical criteria selected from the group comprising: power in central vision, astigmatism in central vision, high order aberration in central vision, acuity in central vision, prismatic deviation in central vision, ocular deviation, object visual field in central vision, image visual field in central vision, magnification in central vision; any one of peripheral vision optical criteria selected from the group comprising: power in peripheral vision, astigmatism in peripheral vision, high order aberration in peripheral vision, pupil field ray deviation, object visual field in peripheral vision, image visual field in peripheral vision, prismatic deviation in peripheral vision, magnification in peripheral vision; any one of global optical criteria selected from the group comprising: magnification of the eye, temple shift, any one of surface criteria selected from the group comprising: front or back mean curvature, front or back minimum curvature, front or back maximum curvature, front or back cylinder axis, front or back cylinder, front or back mean sphere, front or back maximum sphere, front or back minimum sphere, and a value selected from a maximal value, a minimal value, a peak-to-valley value, a maximal gradient value, a minimal gradient value, a maximal slope value, a minimal slope value, and an average value of any one of the preceding criteria, in one or more useful zones of the lens for near-vision, distant-vision and intermediate-vision.