Patent ID: 7147325

Claim:
A series of contact lenses provided as an assorted plurality of contact lenses, each of the contact lenses being formed with an optical zone in a lens center area and a peripheral zone in a lens peripheral area, by forming a back surface optical zone in a center portion of a lens back surface as well as forming a back surface peripheral zone to an outer peripheral side of the back surface optical zone, while forming in a center portion of a lens front surface a front surface optical zone as well as forming a front surface peripheral zone to an outer peripheral side of the front surface optical zone, and each of the contact lenses having a constant entire lens diameter dimension but mutually different optical characteristics in the optical zone, the series of contact lenses being characterized in that in the assorted plurality of contact lenses, a shape of the lens back surface is identical for each lens, and a shape of an area extending a predetermined width in a diametrical direction of a peripheral portion in the front surface peripheral zone is identical for each lens, whereby while a shape of a portion extending a predetermined width in the diametrical direction of at least a peripheral portion in the front surface peripheral zone; and is identical for each lens, a shape of the front surface optical zone differs among the lenses so that the optical characteristics of the optical zone differs among the lenses, wherein different degrees of refractive power of the optical zone are established in the assorted plurality of contact lenses so that optical characteristics of the optical zone differ, and a diameter of the front surface optical zone is varied depending on differences in refractive power of the optical zones.