Spectacle lens, design method for the same, and design system for the same

A design method for a spectacle lens that includes a base area that causes a beam that enters through an object-side surface to exit through an eye-side surface and converge on a retina via the eye and a plurality of defocus areas that each contact the base area and have a characteristic whereby a beam that passes through at least a portion of the defocus area is incident on the retina as a diverging ray, the method comprising:

• a setting step of setting, in not less than half of the plurality of defocus areas, at least one of a defocus power and a size of each defocus area, so as to compensate for a change in retinal spot size due to relative peripheral refraction (RPR) that depends on an eccentricity angle of the eye of a wearer.

A design system for a spectacle lens that includes a base area that causes a beam that enters through an object-side surface to exit through an eye-side surface and converge on a retina via the eye and a plurality of defocus areas that each contact the base area and have a characteristic whereby a beam that passes through at least a portion of the defocus area is incident on the retina as a diverging ray, the system comprising:

• a first selection unit that selects an individual design mode of setting, in not less than half of the plurality of defocus areas, at least one of a defocus power and a size of each defocus area, so as to compensate for a change in retinal spot size due to relative peripheral refraction (RPR) that depends on an eccentricity angle of the eye of a wearer, or selects an existing design mode of employing one from a plurality of pre-prepared design data that includes the base area and the plurality of defocus areas and whose patterns of the defocus areas are mutually different.

The spectacle lens according to claim 17,

• wherein the spectacle lens is a myopia progression inhibition lens.