GB1306857A - Contact lenses - Google Patents

Contact lenses

Info

Publication number
GB1306857A
GB1306857A GB1306857DA GB1306857A GB 1306857 A GB1306857 A GB 1306857A GB 1306857D A GB1306857D A GB 1306857DA GB 1306857 A GB1306857 A GB 1306857A
Authority
GB
United Kingdom
Prior art keywords
lens
contact lenses
point
central portion
concave
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
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.)
KHOO B
Original Assignee
KHOO B
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 KHOO B filed Critical KHOO B
Publication of GB1306857A publication Critical patent/GB1306857A/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
    • G02C7/04—Contact lenses for the eyes

Landscapes

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

Abstract

1306857 Contact lenses B KHOO 31 Aug 1971 [4 June 1970] 26914/70 Heading G2J A contact lens has a central portion having a back surface which is concave, and a peripheral surface which is convex as seen in a cross-section whose sectional plane includes the axis of the generally disc-like form of the lens. As shown, the radius of the concave portion r e is preferably equal to that of the convex portion r p , and the centres are collinear with the point 3 where the two parts merge. The lens contacts the eye at about this point 3. A hole or holes having countersinks on both sides may extend through the lens in the central portion.
GB1306857D 1970-06-04 1970-06-04 Contact lenses Expired GB1306857A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2691470 1970-06-04

Publications (1)

Publication Number Publication Date
GB1306857A true GB1306857A (en) 1973-02-14

Family

ID=10251200

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1306857D Expired GB1306857A (en) 1970-06-04 1970-06-04 Contact lenses

Country Status (1)

Country Link
GB (1) GB1306857A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070006A1 (en) * 1977-08-02 1983-01-19 Automated Optics, Inc. Contact lenses
FR2557707A1 (en) * 1983-12-30 1985-07-05 Ceskoslovenska Akademie Ved PERFORATED SOFT CONTACT LENS AND METHOD FOR MANUFACTURING SUCH LENS
FR2599156A1 (en) * 1986-05-20 1987-11-27 Guyot Bernard Fixed iris correcting short-sighted and long-sighted vision
EP0319281A2 (en) * 1987-11-30 1989-06-07 Animalens Incorporated Contact lenses for animals

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070006A1 (en) * 1977-08-02 1983-01-19 Automated Optics, Inc. Contact lenses
FR2557707A1 (en) * 1983-12-30 1985-07-05 Ceskoslovenska Akademie Ved PERFORATED SOFT CONTACT LENS AND METHOD FOR MANUFACTURING SUCH LENS
GB2152698A (en) * 1983-12-30 1985-08-07 Ceskoslovenska Akademie Ved Perforated soft contact lens and a method for manufacturing it
FR2599156A1 (en) * 1986-05-20 1987-11-27 Guyot Bernard Fixed iris correcting short-sighted and long-sighted vision
EP0319281A2 (en) * 1987-11-30 1989-06-07 Animalens Incorporated Contact lenses for animals
EP0319281A3 (en) * 1987-11-30 1989-11-02 Animalens Incorporated Contact lenses for animals
US4955711A (en) * 1987-11-30 1990-09-11 Animalens, Inc. Contact lenses for animals
AU616703B2 (en) * 1987-11-30 1991-11-07 Animalens, Incorporated Contact lenses for animals and method of fabrication

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
436 Application for cancellation of endorsement 'licences of right' (sect. 36/1949)
436C Endorsement for 'licences of right' cancelled (sect. 36/1949)
PCNP Patent ceased through non-payment of renewal fee