US 12,259,597 B1
Multifocal ophthalmic lenses and related methods
Martin Webber, Southampton (GB); and Percy Lazon de la Jara, San Ramon, CA (US)
Assigned to CooperVision International Limited, Fareham (GB)
Filed by CooperVision International Limited, Fareham (GB)
Filed on Jul. 5, 2024, as Appl. No. 18/764,398.
Application 18/764,398 is a continuation of application No. 18/234,389, filed on Aug. 16, 2023, granted, now 12,111,517.
Application 18/234,389 is a continuation of application No. 17/228,757, filed on Apr. 13, 2021, granted, now 11,762,220.
Claims priority of provisional application 63/017,975, filed on Apr. 30, 2020.
This patent is subject to a terminal disclaimer.
Int. Cl. G02C 7/04 (2006.01); G02C 7/06 (2006.01)
CPC G02C 7/044 (2013.01) [G02C 7/066 (2013.01); G02C 2202/24 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A multifocal ophthalmic lens, wherein:
a first surface of the lens is shaped to form a first surface power map;
a second surface of the lens is shaped to form a second surface power map;
the first and second surface power maps together form a lens power map;
the first surface power map, the second surface power map, or the lens power map comprises a spiral, the spiral having a variation across at least a portion of the lens, wherein the spiral has a first periodic component, in a radial direction extending outwards from the centre of the portion, wherein the period of the first periodic component changes according to radial distance from the centre of the portion of the lens, and wherein the spiral has a second periodic component, with a constant period, in an azimuthal direction about the centre of the portion.