Patent ID: 9746694
Date: 2017-08-29
CPC Classifications: G02C

Claim:
1. A lens set, comprising: a first lens; and a second lens, wherein the first lens and the second lens are respectively a progressive addition lenses for spectacles which has a distance portion and a near portion having different powers and in which an equivalent spherical power of the distance portion is plus; and the first lens and the second lens have different addition powers from each other, and wherein in the first lens, when a horizontal surface power of the distance portion along a vertical reference line or a principal sight line passing through a fitting point is defined as OHPf1, and vertical surface power of the distance portion along the vertical reference line or the principal sight line is defined as OVPf1, and horizontal surface power of the near portion along the vertical reference line or the principal sight line is defined as OHPn1, and vertical surface power of the near portion along the vertical reference line or the principal sight line is defined as OVPn1, in an object-side surface, the OVPn1 is smaller than the OVPf1, and the object-side surface includes a toric surface element in which the OHPf1 is larger than the OVPf1, and the OHPn1 is larger than the OVPn1, and an eyeball-side surface along the vertical reference line or the principal sight line includes an element for cancelling the toric surface element, and also in the second lens, when a horizontal surface power of the distance portion on an object-side surface along a vertical reference line or a principal sight line passing through a fitting point is defined as OHPf2, and vertical surface power of the distance portion along the vertical reference line or the principal sight line is defined as OVPf2, horizontal surface power of the near portion along the vertical reference line or the principal sight line is defined as OHPn2, and vertical surface power of the near portion along the vertical reference line or the principal sight line is defined as OVPn2, in an object-side surface, the OVPn2 is smaller than the OVPf2, and the object-side surface includes a toric surface element in which the OHPf2 is larger than the OVPf2, and the OHPn2 is larger than the OVPn2, and an eyeball-side surface along the vertical reference line or the principal sight line includes an element for cancelling the toric surface element, and a difference between the OVPf1 and the OVPn1, and a difference between the OVPf2 and the OVPn2 are the same.