EP 2140303 A2 20100106 - MULTIFOCAL LENS HAVING A PROGRESSIVE OPTICAL POWER REGION AND A DISCONTINUITY
Title (en)
MULTIFOCAL LENS HAVING A PROGRESSIVE OPTICAL POWER REGION AND A DISCONTINUITY
Title (de)
MULTIFOKALE LINSE MIT OPTISCHEM GLEITSICHTBEREICH UND DISKONTINUITÄT
Title (fr)
LENTILLE MULTIFOCALE AYANT UNE RÉGION DE PUISSANCE OPTIQUE PROGRESSIVE ET UNE DISCONTINUITÉ
Publication
Application
Priority
- US 2008058930 W 20080331
- US 90736707 P 20070329
- US 92497507 P 20070607
- US 93522607 P 20070801
- US 93549207 P 20070816
- US 93557307 P 20070820
- US 95681307 P 20070820
- US 97002407 P 20070905
Abstract (en)
[origin: WO2008121975A2] Embodiments of the present invention relate to a multifocal lens having a diffractive optical power region and a progressive optical power region. Embodiments of the present invention provide for the proper alignment and positioning of each of these regions, the amount of optical power provided by each of the regions, the optical design of the progressive optical power region, and the size and shape of each of the regions. The combination of these design parameters allows for an optical design having less unwanted astigmatism and distortion as well as both a wider channel width and a shorter channel length compared to conventional PALs. Embodiments of the present invention may also provide a new, inventive far-intermediate distance zone and may further provide for increased vertical stability of vision within a zone of the lens.
IPC 8 full level
G02C 7/02 (2006.01)
CPC (source: EP)
G02C 7/061 (2013.01); G02C 7/063 (2013.01); G02C 7/066 (2013.01); G02C 2202/16 (2013.01); G02C 2202/20 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008121975 A2 20081009; WO 2008121975 A3 20081127; WO 2008121975 A4 20090122; CA 2680870 A1 20081009; CA 2680870 C 20141021; EP 2140303 A2 20100106; EP 2140303 A4 20111102; JP 2010522903 A 20100708; TW 200912425 A 20090316
DOCDB simple family (application)
US 2008058930 W 20080331; CA 2680870 A 20080331; EP 08744801 A 20080331; JP 2010501284 A 20080331; TW 97111800 A 20080331