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1. US20190235280 - REDUCED DISTORTION SPECTACLE LENS

Office United States of America
Application Number 16380827
Application Date 10.04.2019
Publication Number 20190235280
Publication Date 01.08.2019
Publication Kind A1
IPC
G02C 7/06
GPHYSICS
02OPTICS
CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
7Optical parts
02Lenses; Lens systems
06bifocal; multifocal
G02C 7/02
GPHYSICS
02OPTICS
CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
7Optical parts
02Lenses; Lens systems
CPC
G02C 2202/08
GPHYSICS
02OPTICS
CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
2202Generic optical aspects applicable to one or more of the subgroups of G02C7/00
08Series of lenses, lens blanks
G02C 7/068
GPHYSICS
02OPTICS
CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
7Optical parts
02Lenses; Lens systems ; ; Methods of designing lenses
06bifocal; multifocal ; ; progressive
061Spectacle lenses with progressively varying focal power
068Special properties achieved by the combination of the front and back surfaces
G02C 7/027
GPHYSICS
02OPTICS
CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
7Optical parts
02Lenses; Lens systems ; ; Methods of designing lenses
024Methods of designing ophthalmic lenses
027considering wearer's parameters
Applicants Carl Zeiss Vision International GmbH
Inventors Ray Steven Spratt
Title
(EN) REDUCED DISTORTION SPECTACLE LENS
Abstract
(EN)

A series of spectacle lenses is disclosed, wherein each lens has a spherical front surface and an aspheric, atoric, or freeform back surface. Further, each lens of the series provides a focal power Px between −6 D and +4 D; and at least one lens of the series provides a focal power Px between at least one of (a) −0.75 D and +2.25 D and (b) −0.5 D and +2.00 D. For an upper range of focal powers, lenses having the same nominal front surface power are provided; and for a lower range of trough powers, lenses having the same minimum nominal back surface power are provided. The spherical front surface has a nominal front surface power Pf and the back surface has a minimum nominal back surface power Pb; wherein 15.5 D≤|Pf|+|Pb|+|Px|≤31.5 D applies for each spectacle lens of the series.