CA2215916A1 - Hard/soft superposition progressive lens design - Google Patents

Hard/soft superposition progressive lens design

Info

Publication number
CA2215916A1
CA2215916A1 CA002215916A CA2215916A CA2215916A1 CA 2215916 A1 CA2215916 A1 CA 2215916A1 CA 002215916 A CA002215916 A CA 002215916A CA 2215916 A CA2215916 A CA 2215916A CA 2215916 A1 CA2215916 A1 CA 2215916A1
Authority
CA
Canada
Prior art keywords
lens design
hard
soft
superposition
progressive lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002215916A
Other languages
French (fr)
Other versions
CA2215916C (en
Inventor
John T. Winthrop
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss Vision Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/588,977 external-priority patent/US5726734A/en
Application filed by Individual filed Critical Individual
Publication of CA2215916A1 publication Critical patent/CA2215916A1/en
Application granted granted Critical
Publication of CA2215916C publication Critical patent/CA2215916C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G02C7/061—Spectacle lenses with progressively varying focal power
    • G02C7/063—Shape of the progressive surface

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)

Abstract

A progressive ophthalmic lens is presented which is a linear composite of a hard lens design and a soft lens design resulting in a composite lens which combines features of the visual utility of a hard lens design with the visual comfort of a soft lens design.
CA002215916A 1996-01-19 1997-01-07 Hard/soft superposition progressive lens design Expired - Lifetime CA2215916C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/588,977 1996-01-19
US08/588,977 US5726734A (en) 1996-01-19 1996-01-19 Hard/soft superposition progressive lens design
PCT/US1997/000059 WO1997026579A1 (en) 1996-01-19 1997-01-07 Hard/soft superposition progressive lens design

Publications (2)

Publication Number Publication Date
CA2215916A1 true CA2215916A1 (en) 1997-07-24
CA2215916C CA2215916C (en) 2006-03-28

Family

ID=36123362

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002215916A Expired - Lifetime CA2215916C (en) 1996-01-19 1997-01-07 Hard/soft superposition progressive lens design

Country Status (1)

Country Link
CA (1) CA2215916C (en)

Also Published As

Publication number Publication date
CA2215916C (en) 2006-03-28

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20170109