US 12,235,521 B2
Method for designing spectacle lens, method for manufacturing spectacle lens, and system for designing spectacle lens
Shohei Matsuoka, Tokyo (JP)
Assigned to HOYA LENS THAILAND LTD., Pathumthani (TH)
Filed by HOYA LENS THAILAND LTD., Pathumthani (TH)
Filed on Jan. 27, 2022, as Appl. No. 17/586,392.
Claims priority of application No. 2021-010740 (JP), filed on Jan. 27, 2021.
Prior Publication US 2022/0236591 A1, Jul. 28, 2022
Int. Cl. G02C 7/02 (2006.01); G02C 7/06 (2006.01)
CPC G02C 7/027 (2013.01) [G02C 7/028 (2013.01); G02C 7/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for designing a spectacle lens, comprising:
when a degree of a change caused by a physical feature of a wearer in at least one of an aberration distribution of an eye of the wearer and an aberration distribution of a spectacle lens worn by the wearer is a first amount, obtaining, as a design solution, a spectacle lens that has an aberration distribution of which rotational asymmetry is a first value in a region having a predetermined width and a center at any point on a main meridian of the spectacle lens; and
when the degree of the change is a second amount, smaller than the first amount, obtaining, as a design solution, a spectacle lens of which rotational asymmetry is a second value, larger than the first value, in the region, wherein
an index that is obtained by quantifying the degree of the change caused by the physical feature of the wearer in at least one of the aberration distribution of the eye and the aberration distribution of the spectacle lens worn by the wearer is represented by Di,
a standard value of Di is represented by Ds,
an index that is obtained by quantifying rotational asymmetry of an aberration distribution of a spectacle lens is represented by Li,
a spectacle lens of which Li is the first value is obtained as a design solution when Di is larger than Ds, and
a spectacle lens of which Li is the second value is obtained as a design solution when Di is not larger than Ds.