Reducing the progression of myopia by means of an adapted active region

A method for calculating or optimizing a spectacle lens for at least one eye of a spectacle wearer such that the spectacle lens comprises a central main viewing region with a substantially constant refractive power, and an effect region adjacent to the central main viewing region, which causes at least partially a higher refractive power, which is a secondary refractive power, than a refractive power in the central main viewing region and/or at least partially a reduction in contrast, wherein the method comprises:

• providing user data including at least a spherical equivalent of a refractive deficit of the at least one eye;
• determining a primary refractive power as the substantially constant refractive power of the central main viewing region for correcting the spherical equivalent of the refractive deficit of the at least one eye;
• and
• ascertaining a horizontal and/or vertical extension of the central main viewing region based on the primary refractive power,
• wherein the provided user data also includes a distance measure that specifies a distance of the spectacle lens to be calculated or optimized from an ocular center of rotation of the at least one eye, and
• wherein the horizontal and/or vertical extension of the central main viewing region;
• is/are:
• ascertained based on the primary power and the distance measure,
• ascertained for a negative value of the primary refractive power as a monotonically decreasing function of the distance of the spectacle lens from the ocular center of rotation, and
• ascertained for a positive value of the primary refractive power as a monotonically increasing function of the distance of the spectacle lens from the ocular center of rotation.

A series of spectacle lenses comprising a plurality of spectacle lenses, each of which comprises:

• a central main viewing region with a substantially constant refractive power, the primary refractive power;
• and
• an effect region adjacent to the central main viewing region, which causes:
• at least partially a higher refractive power than the refractive power in the central main viewing region, and/or
• at least partially a reduction in contrast,
• wherein each spectacle lens in the series is configured for a distance of the spectacle lens from an ocular center of rotation of an eye, and
• wherein the plurality of spectacle lenses in the series differ in pairs both in a value of the primary refractive power and in a horizontal and/or vertical extension of the central main viewing region such that, between the spectacle lenses in the series, the horizontal and/or vertical extension of the central main viewing region:
• varies as a monotonically increasing function of the primary refractive power of the respective spectacle lens,
• varies for a negative value of the primary refractive power as a monotonically decreasing function of the distance of the spectacle lens from the ocular center of rotation, and
• varies for a positive value of the primary refractive power as a monotonically increasing function of the distance of the spectacle lens from the ocular center of rotation.

A device for calculating or optimizing a spectacle lens for at least one eye of a spectacle wearer, such that the spectacle lens includes a central main viewing region with a substantially constant refractive power, and an effect region adjacent to the central main viewing region, which causes at least partially a higher refractive power, which is a secondary refractive power, than the refractive power in the central main viewing region, and/or at least partially a reduction in contrast, wherein the device comprises:

• a data interface configured to acquire user data comprising at least a spherical equivalent of a refractive deficit of the at least one eye;
• a determination module configured to determine a primary refractive power as the substantially constant refractive power of the central main viewing region for correcting the spherical equivalent of the refractive deficit of the at least one eye;
• and
• an ascertaining module configured to ascertain a horizontal and/or vertical extension of the central main viewing region based on the primary refractive power,
• wherein the acquired user data also includes a distance measure that specifies a distance of the spectacle lens to be calculated or optimized from an ocular center of rotation of the at least one eye, and
• wherein the horizontal and/or vertical extension of the central main viewing region:
• is/are;
• ascertained based on the primary refractive power and the distance measure,
• ascertained for a negative value of the primary refractive power as a monotonically decreasing function of the distance of the spectacle lens from the ocular center of rotation, and
• ascertained for a positive value of the primary refractive power as a monotonically increasing function of the distance of the spectacle lens from the ocular center of rotation.