GB655901A - Improvements in or relating to ophthalmic contact lenses - Google Patents

Improvements in or relating to ophthalmic contact lenses

Info

Publication number
GB655901A
GB655901A GB1984148A GB1984148A GB655901A GB 655901 A GB655901 A GB 655901A GB 1984148 A GB1984148 A GB 1984148A GB 1984148 A GB1984148 A GB 1984148A GB 655901 A GB655901 A GB 655901A
Authority
GB
United Kingdom
Prior art keywords
tool
seating
spherical
sheet
conical
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
GB1984148A
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.)
Individual
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
Application filed by Individual filed Critical Individual
Priority to GB1984148A priority Critical patent/GB655901A/en
Publication of GB655901A publication Critical patent/GB655901A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00038—Production of contact lenses
    • B29D11/00105—Production of contact lenses covering a large part of the cornea
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00019—Production of simple or compound lenses with non-spherical faces, e.g. toric faces
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ophthalmology & Optometry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

655,901. Contact lenses. STIDWILL, L. July 24, 1948, No. 19841. [Class 97 (i)] [Also in Group V] An ophthalmic contact lens is formed of thermoplastic material, e.g. polymethyl methacrylate and the inner surface of the haptic thereof is formed with a conical area 5, which extends from the optic 1 and is blended into a rear spherical portion 3 of the haptic, an annular pocket 4 being provided at the junction of said conical and spherical portions. Apparatus for forming the lens comprises a base 8 supporting a cylindrical body 9 and an electric heater 10. A moulding unit 11 is detachably screwed to body 9 and includes a socket 12 supporting a die 19 having a spherical cavity 20. Clamped marginally between a cylinder 22 and a spacing ring 21 is a sheet 33 of thermoplastic material and axially adjustable in the cylinder and a packing ring 23 is a cylindrical pressing tool 24, the lower end 29 of which is spherical. The tool which is slidable in the cylinder under the control of a milled knob 18, includes a conical seating 26 for a steel ball 30, said seating having a shank 27 screwed into a bore 28 whereby the seating is axially adjustable in the tool to vary the degree of projection of ball 30 from the lower end 29 of the tool. In use, the sheet 33 is heated until the plastic material is workable and the tool 24 is moved downwardly so as to stretch the sheet and thus form the contact lens. Specification 634,178 is referred to. Reference has been directed by the Comptroller to Specification 666,319.
GB1984148A 1948-07-24 1948-07-24 Improvements in or relating to ophthalmic contact lenses Expired GB655901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1984148A GB655901A (en) 1948-07-24 1948-07-24 Improvements in or relating to ophthalmic contact lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1984148A GB655901A (en) 1948-07-24 1948-07-24 Improvements in or relating to ophthalmic contact lenses

Publications (1)

Publication Number Publication Date
GB655901A true GB655901A (en) 1951-08-08

Family

ID=10136118

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1984148A Expired GB655901A (en) 1948-07-24 1948-07-24 Improvements in or relating to ophthalmic contact lenses

Country Status (1)

Country Link
GB (1) GB655901A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0170046A2 (en) * 1984-07-05 1986-02-05 Otto-Christian Dr. Geyer Manufacturing process for optical contact elements
EP0923918A2 (en) * 1997-11-20 1999-06-23 Menicon Co., Ltd. Eye bandage used after intraocular surgical operation
WO2006121591A1 (en) * 2005-05-06 2006-11-16 Synergeyes, Inc. Hybrid contact lens system and method of fitting
US7377637B2 (en) 2005-10-11 2008-05-27 Synergeyes, Inc. Hybrid contact lens system and method of fitting
US7537339B2 (en) 2006-05-25 2009-05-26 Synergeyes, Inc. Hybrid contact lens system and method of fitting
US20150088297A1 (en) * 2013-09-20 2015-03-26 Gregory Gemoules System and method for designing scleral lenses

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0170046A2 (en) * 1984-07-05 1986-02-05 Otto-Christian Dr. Geyer Manufacturing process for optical contact elements
EP0170046A3 (en) * 1984-07-05 1986-07-30 Bayer Ag Manufacturing process for optical contact elements
EP0923918A2 (en) * 1997-11-20 1999-06-23 Menicon Co., Ltd. Eye bandage used after intraocular surgical operation
EP0923918A3 (en) * 1997-11-20 1999-09-01 Menicon Co., Ltd. Eye bandage used after intraocular surgical operation
US6093868A (en) * 1997-11-20 2000-07-25 Menicon Co., Ltd. Eye bandage used after intraocular surgical operation
WO2006121591A1 (en) * 2005-05-06 2006-11-16 Synergeyes, Inc. Hybrid contact lens system and method of fitting
US7543936B2 (en) 2005-05-06 2009-06-09 Synergeyes, Inc. Hybrid contact lens system and method of fitting
US7377637B2 (en) 2005-10-11 2008-05-27 Synergeyes, Inc. Hybrid contact lens system and method of fitting
US7537339B2 (en) 2006-05-25 2009-05-26 Synergeyes, Inc. Hybrid contact lens system and method of fitting
US20150088297A1 (en) * 2013-09-20 2015-03-26 Gregory Gemoules System and method for designing scleral lenses
US9421721B2 (en) * 2013-09-20 2016-08-23 Gregory Gemoules System and method for designing scleral lenses
US10095213B2 (en) 2013-09-20 2018-10-09 Gregory Gemoules System and method for designing scleral lenses

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