Lens and method for retarding myopia progression

A concentric annular multi-zone lens for retarding myopia progression in a human eye, the concentric annular multi-zone lens comprising:

• a plurality of correcting zones for forming a focused image on a retina of the human eye so as to correct refractive error of the human eye, wherein the plurality of correcting zones has a same refractive power, and wherein the plurality of correcting zones includes a central correcting zone;
• a plurality of defocusing zones for forming images anterior to the retina so as to generate myopic defocus, wherein the plurality of correcting zones and the plurality of defocusing zones are alternated in the concentric annular multi-zone lens;
• a defocusing power increasing region, in which refractive powers of defocusing zones are increasingly relatively positive towards a periphery of the lens, wherein the defocusing power increasing region includes a first defocusing zone of the plurality of defocusing zones, the first defocusing zone immediately surrounding the central correcting zone such that the first defocusing zone is lowest in refractive power among the defocusing zones in the defocusing power increasing region, and wherein the first defocusing zone is more positive in refractive power than the central correcting zone;
• and
• a defocusing power constant region, in which refractive powers of defocusing zones are the same, wherein the defocusing power constant region is located after the defocusing power increasing region towards the periphery of the lens, and the refractive powers of the defocusing zones in the defocusing power constant region are the same as the refractive power of the last defocusing zone in the defocusing power increasing region, wherein the refractive powers of the defocusing zones in the defocusing power increasing region are configured to increase based on a measured relative peripheral refractive error of the human eye to compensate for diminishing myopic defocus at the periphery of the retina.