CA1012391A - Multifocal ophthalmic lens - Google Patents

Multifocal ophthalmic lens

Info

Publication number
CA1012391A
CA1012391A CA204,519A CA204519A CA1012391A CA 1012391 A CA1012391 A CA 1012391A CA 204519 A CA204519 A CA 204519A CA 1012391 A CA1012391 A CA 1012391A
Authority
CA
Canada
Prior art keywords
ophthalmic lens
multifocal ophthalmic
multifocal
lens
ophthalmic
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.)
Expired
Application number
CA204,519A
Other versions
CA204519S (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.)
American Optical Corp
Original Assignee
American Optical Corp
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
Application filed by American Optical Corp filed Critical American Optical Corp
Application granted granted Critical
Publication of CA1012391A publication Critical patent/CA1012391A/en
Expired 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
    • G02C7/065—Properties on the principal line
    • 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
    • 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
    • G02C7/068—Special properties achieved by the combination of the front and back surfaces
CA204,519A 1973-08-16 1974-07-10 Multifocal ophthalmic lens Expired CA1012391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US38904473A 1973-08-16 1973-08-16

Publications (1)

Publication Number Publication Date
CA1012391A true CA1012391A (en) 1977-06-21

Family

ID=23536594

Family Applications (1)

Application Number Title Priority Date Filing Date
CA204,519A Expired CA1012391A (en) 1973-08-16 1974-07-10 Multifocal ophthalmic lens

Country Status (3)

Country Link
CA (1) CA1012391A (en)
CH (1) CH583915A5 (en)
GB (1) GB1484196A (en)

Also Published As

Publication number Publication date
CH583915A5 (en) 1977-01-14
GB1484196A (en) 1977-09-01

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