Patent ID: 7631969

Claim:
A combined spectacle lens comprising a combination of a basic lens and an auxiliary lens used only for an application to be combined with the basic lens and has a power to convert a design type of the basic lens, the basic lens formed with a progressive-power surface including a first power portion having a power for viewing an object at a predetermined distance, a second power portion having a power different from that in the first power portion, and a progressive portion in which the power is progressively changed from the first power portion to the second power portion on either one or both of refractive surfaces on an object side and an eyeball side, wherein a resultant power obtained by combining a basic lens power of the basic lens and an auxiliary lens power of the auxiliary lens is partly or entirely different from that of the basic lens power, wherein the auxiliary lens is removably combined with the basic lens, wherein the auxiliary lens has at least one area having a power variation, and wherein a location of an initial point of progressivity and a terminating point of progressivity of the combined lens are different from the basic lens.