US 12,072,557 B2
Ophthalmic lens, design method for the same, manufacturing method for the same, and ophthalmic lens set
Akira Shimojo, Tokyo (JP); and Kazuo Nakazawa, Tokyo (JP)
Assigned to HOYA CORPORATION, Tokyo (JP)
Appl. No. 17/284,727
Filed by HOYA CORPORATION, Tokyo (JP)
PCT Filed Dec. 10, 2018, PCT No. PCT/JP2018/045234
§ 371(c)(1), (2) Date Apr. 12, 2021,
PCT Pub. No. WO2020/075312, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 2018-192437 (JP), filed on Oct. 11, 2018.
Prior Publication US 2021/0318556 A1, Oct. 14, 2021
Int. Cl. G02C 7/06 (2006.01); G02C 7/04 (2006.01)
CPC G02C 7/06 (2013.01) [G02C 7/04 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An ophthalmic lens comprising:
an optical portion that includes
a near-vision portion having a near-vision spherical power for seeing a near distance,
a far-vision portion having a far-vision spherical power for seeing a distance that is farther than the near distance, and
an annular intermediate portion that connects the near-vision portion and the far-vision portion to each other, the near-vision portion or the far-vision portion being arranged at the center, the near-vision portion or the far-vision portion that is not arranged at the center being arranged in a ring shape along an outer edge of the intermediate portion, wherein
the intermediate portion includes
a portion A in which a spherical power is strengthened and thereafter weakened when the lens is viewed in an X direction from the center toward the periphery, and
a portion A′ in which the spherical power is strengthened and thereafter weakened when the lens is viewed in an X′ direction from the center toward the periphery, the X′ direction being exactly opposite to the X direction,
(i) the spherical power being strengthened for far vision to be stronger than the far-vision spherical power of the far-vision portion and thereafter weakened to reach the far-vision spherical power in the X direction in the portion A and in the X′ direction in the portion A′ when the far-vision portion is arranged in the ring shape along the outer edge of the intermediate portion or
(ii) the spherical power being strengthened for near vision to be stronger than the near-vision spherical power of the near-vision portion and thereafter weakened to reach the near-vision spherical power in the direction in the portion A and in the X′ direction the portion A′ when the near-vision portion is arranged in the ring shape along the outer edge of the intermediate portion.