EP1143893A1 - Flechisseurs corneens - Google Patents

Flechisseurs corneens

Info

Publication number
EP1143893A1
EP1143893A1 EP99943095A EP99943095A EP1143893A1 EP 1143893 A1 EP1143893 A1 EP 1143893A1 EP 99943095 A EP99943095 A EP 99943095A EP 99943095 A EP99943095 A EP 99943095A EP 1143893 A1 EP1143893 A1 EP 1143893A1
Authority
EP
European Patent Office
Prior art keywords
vacuum
curver
former
cornea
transparent material
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.)
Withdrawn
Application number
EP99943095A
Other languages
German (de)
English (en)
Inventor
Owen O. Dowd
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
Publication of EP1143893A1 publication Critical patent/EP1143893A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/013—Instruments for compensation of ocular refraction ; Instruments for use in cornea removal, for reshaping or performing incisions in the cornea
    • 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
    • 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
    • G02C7/047—Contact lens fitting; Contact lenses for orthokeratology; Contact lenses for specially shaped corneae

Definitions

  • This invention concerns to the recurving of the cornea to improve eyesight-
  • a vacuum former which may be shaped and worn rather like a contact lens.
  • the vacuum former is comprised of an inner surface that takes the curvature the cornea would take if it were to focus eyesight correctly while the outer surface may let the eye lids function normally.
  • the vacuum former may have an outer vacuum sealing ring either as part of the vacuum former moulding or as a separate moulding.
  • the curver may also include any of the following in its makeup:
  • Figure 1 shows a curver for short sightedness , astigmatism and perhaps deformities and damage) .
  • Figure 2 shows a curver for long sightedness , astigmatism and perhaps deformities and damage).
  • Figure 3 shows a syringe as a method to apply a vacuum.
  • Figure 4 shows a vacuum reserve vessel as a means to maintain a vacuum.
  • the patient in question takes a normal eye test which may also include measuring the circumference and the curvature of the cornea. This will allow the correct vacuum former to be determined.
  • the patient is then fitted with one or more samples curvers to check for suitability. Curvers may be applied washed and generally cared for like contact lenses.
  • the curver as in figure 1 for short sightedness and figure 2 for long sightedness is removed from its storage container with tube 6 attached. It is then placed over the cornea 2 of the eye 1 with tube 6 coming out at one side of the eye. The end of the tube 6 is connected to the vacuum reserve vessel as in Figure 4.
  • the syringe as in Figure 3 is attached to the vacuum reserve vessels socket 8 in which there is a valve 9 to hold the vacuum and a vacuum level relief valve 10 prevent excessive vacuum.
  • the tube may be removed while maintaining a vacuum but when the vacuum escapes then the vacuum former will no longer be effective.
  • vacuum reserve vessel can then be secured behind the ear or another suitable place.
  • the vacuum should be withdrawn from the vacuum former.
  • the vacuum former may still be firmly attached to the cornea and should be left for an interval during which a lubricating solution can be applied to help the vacuum former release from the eye. Removal should never be rushed.
  • Treatment may be prescribed for curvers to be worn for the active day time hours and as treatment progresses and the cornea starts to settle into its new curvature treatment may perhaps be switched to the inactive night time hours. Alternatively perhaps treatment may be applied at the inactive night time hours only.
  • treatment be carried out over a prescribed specified period of time with the aim of reshaping the curvature of the cornea thereby correcting or improving the eye sight focally on a long term basis.
  • Treatment may include wearing curvers at regular intervals there after to insure the cornea stays in shape.

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

Il est possible d'utiliser des fléchisseurs pour corriger ou améliorer l'hypermétropie, la myopie, l'astigmatisme et peut-être d'autres difformités. On suggère que le fléchisseur des Figures 1 et 2 soit fait d'un matériau dur rigide transparent (3) et d'un matériau mou flexible transparent (7). Sa surface intérieure peut prendre la courbure qu'aurait la cornée si l'oeil était focalisé. Ces fléchisseurs à dépression peuvent se porter comme des lentilles de contact. Le tube (6) sortant du fléchisseur est relié au réservoir à réserve de vide de la figure 4. La seringue de la figure 3 est reliée à une prise du réservoir à réserve de vide de la figure 4. La dépression provoquée par l'ouverture de la seringue force la cornée à épouser la forme de la surface intérieure du fléchisseur à dépression, ce qui a pour effet de focaliser l'oeil. Ce fléchisseur peut se porter régulièrement pendant une période définie de temps avec comme objectif d'aboutir à long terme à une correction ou une amélioration de la vision.
EP99943095A 1998-09-02 1999-08-25 Flechisseurs corneens Withdrawn EP1143893A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9819124.0A GB9819124D0 (en) 1998-09-02 1998-09-02 Curvers
GB9819124 1998-09-02
PCT/GB1999/002889 WO2000013630A1 (fr) 1998-09-02 1999-08-25 Flechisseurs corneens

Publications (1)

Publication Number Publication Date
EP1143893A1 true EP1143893A1 (fr) 2001-10-17

Family

ID=10838225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99943095A Withdrawn EP1143893A1 (fr) 1998-09-02 1999-08-25 Flechisseurs corneens

Country Status (4)

Country Link
EP (1) EP1143893A1 (fr)
AU (1) AU5637999A (fr)
GB (1) GB9819124D0 (fr)
WO (1) WO2000013630A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5695509A (en) * 1995-03-10 1997-12-09 El Hage; Sami G. Aspherical optical molds for continuous reshaping the cornea based on topographical analysis
US5690123A (en) * 1996-07-15 1997-11-25 Medina; Antonio Method of altering the shape of the cornea
US5772675A (en) * 1996-10-31 1998-06-30 Chiron Vision Corporation Positioning assembly for retaining and positioning a cornea

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0013630A1 *

Also Published As

Publication number Publication date
AU5637999A (en) 2000-03-27
GB9819124D0 (en) 1998-10-28
WO2000013630A1 (fr) 2000-03-16

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