Method for determining the clyinder of an ophthalmic lens

    公开(公告)号:US11409131B2

    公开(公告)日:2022-08-09

    申请号:US16609629

    申请日:2018-05-02

    IPC分类号: G02C7/02 A61B3/036

    摘要: A method for determining a cylinder of an ophthalmic lens to be mounted on a spectacle frame is provided, the method including: providing a measuring device configured to run a Jackson Cross Cylinder procedure; determining components of a first vector of the cylinder in a two-dimensional vector cylinder representation; and determining components of a second vector of the cylinder in the two-dimensional vector cylinder representation, the components of the second vector of the cylinder being determined such that a Euclidian distance between the first vector and the second vector is independent of a value of the cylinder.

    Method for optical design of a pair of ophthalmic lenses and pair of ophthalmic lenses thus obtained

    公开(公告)号:US10247963B2

    公开(公告)日:2019-04-02

    申请号:US15522474

    申请日:2014-10-31

    IPC分类号: G02C7/02 G02C7/06 G02C13/00

    摘要: Disclosed is a method for optical design of a pair of ophthalmic lenses for correcting spherical and cylindrical refractive errors of the eyes of a wearer, including a step of defining the need for spherical and cylindrical correction of the wearer for various viewing distances, and a step of determining the spherical and cylindrical power of the ophthalmic lenses at viewing points with various proximities, in accordance with the correction needs of the wearer. The power of at least one of the two ophthalmic lenses is determined such as to limit the deviation obtained therebetween upon adding equivalent spherical power between the viewing points with various proximities and/or varying the cylindrical power vector between the viewing points with various proximities. Also disclosed is a pair of ophthalmic lenses designed according to such a method.

    Method of determining an eye parameter of a user of a display device

    公开(公告)号:US11550151B2

    公开(公告)日:2023-01-10

    申请号:US16345510

    申请日:2016-10-28

    摘要: Disclosed is a method for determining an eye parameter of a user of a display device, the eye parameter relating to a dioptric parameter of an ophthalmic lens to be provided to the user, the method including: a display device providing step, during which a binocular display device is provided to the user,—an image display step, during which an image is displayed to the user when using the display device; a display parameter modifying step, during which at least one parameter of the display device is modified so as to modify the virtual display distance of the perceived image, wherein the display parameter modifying step is repeated until image subjective quality of the perceived image is perceived by the user as optimal; and an eye parameter determining step during which an eye parameter is determined based on the parameter of the display device.

    Measurement method for the determination of a value of a visual correction need for near vision of an individual

    公开(公告)号:US11278200B2

    公开(公告)日:2022-03-22

    申请号:US16333424

    申请日:2017-09-14

    摘要: Disclosed is a measurement method for determining a value of a visual correction need for near vision of an individual in a natural posture for near vision. A recognizing limit distance is determined so that the individual is able to recognize at least one predetermined symbol farther than the limit distance relatively to the individual and unable to recognize the at least one predetermined symbol closer to the individual than the limit distance. A portable medium displaying the predetermined symbol is displaced in front of the face and eyes of the individual to change a frontal distance between his/her eyes and the portable medium and in which when a recognizing limit distance is detected by the individual, the limit distance is measured and the value of the visual correction need is determined from the measured limit distance, wherein the visual correction need includes an accommodation compensation need.

    Method for providing an ophthalmic lens to a wearer

    公开(公告)号:US10859855B2

    公开(公告)日:2020-12-08

    申请号:US16092654

    申请日:2017-04-11

    IPC分类号: G02C7/02 G02C7/06 A61B3/04

    摘要: A method for providing an ophthalmic lens to a wearer including: providing the wearer's astigmatism features measured at a first proximity; providing the wearer's astigmatism features measured at a second proximity, wherein the second proximity is greater than the first proximity; determining customized wearer's astigmatism features based on the combination resulting of linear combinations of the wearer's astigmatism features measured at the first proximity and of the wearer's astigmatism features measured at the second proximity; and applying the customized astigmatism features to the ophthalmic lens.