Contact lens for myopia with or without astigmatism

A contact lens for a myopic eye, the contact lens comprising:

• a front surface;
• a back surface;
• an optical center;
• an optical axis;
• an optical zone about the optical center, the optical zone comprising a power map characterised by a plurality of meridional power distributions across the optical zone, and a plurality of azimuthal power distributions about the optical axis;
• and
• a non-optical peripheral carrier zone about the optical zone, the non-optical peripheral carrier zone comprising a plurality of azimuthal thickness distributions about the optical axis;
• wherein at least one of the azimuthal power distributions is partially variant and is devoid of mirror symmetry;
• and wherein at least one of the meridional power distributions is partially variant and is devoid of mirror symmetry;
• wherein the power map, at least in part, provides a foveal correction for the eye, and at least in part, provides a conoid of partial blur, serving as a directional cue, or an optical signal, at the retina of the myopic eye for at least one of slowing, retarding, or reducing myopia progression;
• wherein the non-optical peripheral carrier zone is configured to facilitate on-eye lens rotation, the configuration of the non-optical peripheral carrier zone comprising at least one of the azimuthal thickness distributions being substantially invariant to facilitate substantially free rotation of the contact lens on the eye or comprising at least one rotation assisting feature;
• and
• wherein the conoid of partial blur has a depth of at least 0.5 mm at the retina of the eye;
• wherein the conoid of partial blur spans at least a para-macular region of the retina of the eye;
• and wherein the para-macular region includes at least 20-degree field on the retina of the myopic eye.

A contact lens for a myopic eye, the contact lens comprising:

• a front surface;
• a back surface;
• an optical center;
• an optical axis;
• an optical zone about the optical center, the optical zone comprising a power map characterised by a plurality of meridional power distributions across the optical zone, and a plurality of azimuthal power distributions about the optical axis;
• and
• a non-optical peripheral carrier zone about the optical zone, the non-optical peripheral carrier zone comprising a plurality of azimuthal thickness distributions about the optical axis;
• wherein at least one of the azimuthal power distributions is partially variant and is devoid of mirror symmetry;
• and wherein at least one of the meridional power distributions is partially variant and is devoid of mirror symmetry;
• wherein the power map, at least in part, provides a foveal correction for the eye, and at least in part, provides a conoid of partial blur, serving as a directional cue, or an optical signal, at the retina of the myopic eye for at least one of slowing, retarding, or reducing myopia progression;
• wherein the non-optical peripheral carrier zone is configured to facilitate on-eye lens rotation, the configuration of the non-optical peripheral carrier zone comprising at least one of the azimuthal thickness distributions being substantially invariant to facilitate substantially free rotation of the contact lens on the eye or comprising at least one rotation assisting feature;
• and
• wherein at least one of the azimuthal thickness distributions is substantially invariant to facilitate substantially free rotation of the contact lens and wherein the substantially free rotation is gauged as a rotation of the contact lens by 180 degrees at least thrice per 8 hours of lens wear, and at least 15 degrees within 1 hour of lens wear.

A contact lens for a myopic eye, the contact lens comprising:

• a front surface;
• a back surface;
• an optical center;
• an optical axis;
• an optical zone about the optical center, the optical zone comprising a power map characterised by a plurality of meridional power distributions across the optical zone, and a plurality of azimuthal power distributions about the optical axis;
• and
• a non-optical peripheral carrier zone about the optical zone, the non-optical peripheral carrier zone comprising a plurality of azimuthal thickness distributions about the optical axis;
• wherein at least one of the azimuthal power distributions is partially variant and is devoid of mirror symmetry;
• and wherein at least one of the meridional power distributions is partially variant and is devoid of mirror symmetry;
• wherein the power map, at least in part, provides a foveal correction for the eye, and at least in part, provides a conoid of partial blur, serving as a directional cue, or an optical signal, at the retina of the myopic eye for at least one of slowing, retarding, or reducing myopia progression;
• wherein the non-optical peripheral carrier zone is configured to facilitate on-eye lens rotation, the configuration of the non-optical peripheral carrier zone comprising at least one of the azimuthal thickness distributions being substantially invariant to facilitate substantially free rotation of the contact lens on the eye or comprising at least one rotation assisting feature;
• and
• wherein the at least one rotation assisting feature is selected to allow for a desired lens rotation providing a desired visual performance while maintaining the desired spatially and temporally varying optical stop signal for the myopic eye such that the efficacy of the directional signal remains substantially consistent over time.