GB603136A - Improvements in or relating to ophthalmic lenses - Google Patents

Improvements in or relating to ophthalmic lenses

Info

Publication number
GB603136A
GB603136A GB3427445A GB3427445A GB603136A GB 603136 A GB603136 A GB 603136A GB 3427445 A GB3427445 A GB 3427445A GB 3427445 A GB3427445 A GB 3427445A GB 603136 A GB603136 A GB 603136A
Authority
GB
United Kingdom
Prior art keywords
group
distance
eye
lenses
computed
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
GB3427445A
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
Priority to GB3427445A priority Critical patent/GB603136A/en
Publication of GB603136A publication Critical patent/GB603136A/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

Abstract

603,136. Spectacle lenses. ABBEY, A. (American Optical Co.). Dec. 18, 1945, No. 34274. Drawings to Specification. [Class 97 (i)] A series of lenses, or of lens blanks, corrected to reduce marginal or oblique errors to a minimum, each member of the series differing in power from the adjacent members is divided into groups, the members of each group having the same " base curve " computed in accordance with the distance between the centre of rotation of the eye and the lens when in use, such distance varying from group to group. The invention is based on the fact'that the distance from the cornea to the centre of rotation of the eye is proportional to the refractive error of the eye. The lenses or blanks are computed as described in Specification 262,319, [Class 97 (i)], the rotational distance being varied from group to group. A graph illustrating the variation of oblique errors with the rotational distance is included in the Specification.
GB3427445A 1945-12-18 1945-12-18 Improvements in or relating to ophthalmic lenses Expired GB603136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3427445A GB603136A (en) 1945-12-18 1945-12-18 Improvements in or relating to ophthalmic lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3427445A GB603136A (en) 1945-12-18 1945-12-18 Improvements in or relating to ophthalmic lenses

Publications (1)

Publication Number Publication Date
GB603136A true GB603136A (en) 1948-06-09

Family

ID=10363584

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3427445A Expired GB603136A (en) 1945-12-18 1945-12-18 Improvements in or relating to ophthalmic lenses

Country Status (1)

Country Link
GB (1) GB603136A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996029624A1 (en) * 1995-03-23 1996-09-26 Piero Petroccione Glasses with lens set interchangeable to the variation of the subjective status caused by visual tiredness

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996029624A1 (en) * 1995-03-23 1996-09-26 Piero Petroccione Glasses with lens set interchangeable to the variation of the subjective status caused by visual tiredness

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