公开(公告)号：US10203523B2

公开(公告)日：2019-02-12

申请号：US15518158

申请日：2015-10-09

Applicant: HOYA LENS THAILAND LTD.

Inventor： Kazuma Kozu ,  Takao Tanaka

IPC: G02C7/06

Abstract: Progressive power lens including: object side surface; eyeball side surface; and at least a near portion having a power for near vision, wherein object side surface includes power change in vertical direction of lens having progressive refractive power function, eyeball side surface includes power change in horizontal direction of lens having progressive refractive power function, when surface refractive power in the horizontal direction is defined as DHn and surface refractive power in vertical direction is defined as DVn in near power measurement point N in object side surface, relational expression of DHn

公开(公告)号：US12007627B2

公开(公告)日：2024-06-11

申请号：US17256438

申请日：2019-06-28

Applicant: HOYA LENS THAILAND LTD.

Inventor： Kazuma Kozu

IPC: G02C7/02 ,  G02C7/06

CPC classification number: G02C7/027 ,  G02C7/025 ,  G02C7/063 ,  G02C7/068

Abstract: A progressive addition lens design method includes adjusting a lens surface shape to bring a difference between a first state when an object at a first location in a wearer's front and on the wearer's medial plane is visually recognized and a second state when an object at a second location positioned on the first location side in the horizontal direction at a constant height in the vertical direction is visually recognized in a plane parallel to a frontal plane and includes the first location at the time the lens is worn closer to a difference between a third state when an object at the first location is visually recognized and a fourth state when an object at the second location is visually recognized at the time a reference single focal lens corresponding to the progressive addition lens is worn or at the time equivalent to a naked eye.

公开(公告)号：US10401650B2

公开(公告)日：2019-09-03

申请号：US15539862

申请日：2015-12-28

Applicant: HOYA LENS THAILAND LTD.

Inventor： Tadashi Kaga ,  Ayumu Ito ,  Kazuma Kozu

IPC: G02C7/06 ,  G02C7/02 ,  G02C7/14

Abstract: A technology concerns a spectacle lens to suppress unnecessary convergence. In the spectacle lens, when an inner horizontal direction of the spectacle lens is a direction toward the nose of a user who wears the spectacle lens, and an outer horizontal direction of the spectacle lens is a direction toward an ear of the user, a shape of a base in prism is formed in a portion in which power continuously changes and through which a main line of sight, influenced by convergence of the user of the spectacle lens, passes such that at least a part of a base out prism, which may be generated in the portion, is cancelled.