Diffractive multifocal small aperture ophthalmic lens

A transmissive ophthalmic lens, comprising:

• a first surface opposite a second surface;
• the first surface comprising a centrally disposed diffractive multifocal zone surrounded by a peripherally disposed refractive non-multifocal zone;
• the second surface being a refractive non-multifocal surface;
• wherein the diffractive multifocal zone is no more than 2.5 millimeters configured to mitigate halos and no less than 1.5 mm diameters configured for the transmissive ophthalmic lens to manifest multipeak performance with a far focus and an Add focus;
• wherein a first groove and a second groove of the diffractive multifocal zone are the only two grooves;
• wherein at least 20% of light directed within the diffractive multifocal zone is to one of the far and the Add focus;
• including a smoothened transition disposed between the first groove and the second groove that includes a refractive segment connected to each groove by a step;
• and
• wherein the refractive non-multifocal zone is configured to form the far focus.

A transmissive ophthalmic lens, comprising:

• a first surface opposite a second surface;
• the first surface comprising a centrally disposed diffractive multifocal zone surrounded by a peripherally disposed refractive non-multifocal zone;
• the second surface being a refractive non-multifocal surface;
• wherein the diffractive multifocal zone is no more than 2.5 millimeters configured to mitigate halos and no less than 1.5 mm diameters configured for the transmissive ophthalmic lens to manifest multipeak performance with a far focus and an Add focus;
• wherein at least 20% of light directed within the diffractive multifocal zone is to one of the far and the Add focus;
• wherein the diffractive multifocal zone includes not more than two grooves of low periodicity structure each consisting of two widths of high periodicity structure;
• and
• wherein the refractive non-multifocal zone is configured to form the far focus.