Method For Producing A Customized Progressive Ophthalmic Lens

摘要

A method for producing a customized progressive ophthalmic lens intended for a wearer having a prescription for a wearer's eye corresponding to said lens, the method comprising the following steps: a) providing an initial progressive ophthalmic lens design having a meridian line; b) providing binocular convergence data for the wearer; and c) modifying the initial design so that the meridian line is laterally shifted in position with respect to said initial design, for matching the convergence data provided at step b), for said prescription, and the modified design as resulting from step c) is used for the customized lens, wherein step b) comprises the following substeps: b1) providing a visual stimulus in a sagittal plane of the wearer; and b2) moving the visual stimulus within the sagittal plane between a predetermined maximum distance and a predetermined minimum distance.

主权项

1. A method for producing a customized progressive ophthalmic lens intended for a wearer having a prescription for a wearers eye corresponding to said lens, the method comprising the following steps:
a) providing an initial progressive ophthalmic lens design having a meridian line; b) providing binocular convergence data for the wearer; and c) modifying the initial design so that the meridian line is laterally shifted in position with respect to said initial design, for matching the convergence data provided at step b), for said prescription, and the modified design as resulting from step c) is used for the customized lens, wherein step b) comprises the following substeps: b1) providing a visual stimulus in a sagittal plane of the wearer; b2) moving the visual stimulus within the sagittal plane between a predetermined maximum distance and a predetermined minimum distance; b3) determining, for at least one distance of the visual stimulus between the predetermined maximum and minimum distances, an azimuth angle existing for an ocular axis of the wearer's eye when the wearer is looking at the visual stimulus located at said visual stimulus distance; and b4) calculating, for each azimuth angle determined at step b3), a convergence distance. and an assignment of each convergence distance to the corresponding visual stimulus distance forms the convergence data used in step c),