WO2000013630A1 - Corneal curvers - Google Patents

Corneal curvers Download PDF

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Publication number
WO2000013630A1
WO2000013630A1 PCT/GB1999/002889 GB9902889W WO0013630A1 WO 2000013630 A1 WO2000013630 A1 WO 2000013630A1 GB 9902889 W GB9902889 W GB 9902889W WO 0013630 A1 WO0013630 A1 WO 0013630A1
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum
curver
former
cornea
transparent material
Prior art date
Application number
PCT/GB1999/002889
Other languages
French (fr)
Inventor
Owen O Dowd
Original Assignee
Owen O Dowd
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 Owen O Dowd filed Critical Owen O Dowd
Priority to EP99943095A priority Critical patent/EP1143893A1/en
Priority to AU56379/99A priority patent/AU5637999A/en
Publication of WO2000013630A1 publication Critical patent/WO2000013630A1/en

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

Abstract

Curvers may be used for correcting or improving long sightedness, short sightedness, astigmatism and perhaps other deformities. The curver shown in Figures 1 and 2 is suggested to be hard rigid transparent material (3) and soft flexible transparent material (7). Its inner surface may take the curvature the cornea would take if the eye sight were focused. The vacuum formers may be worn like contact lenses. The tube (6) from the vacuum former is connected to the vacuum reserve vessel in Figure 4. The syringe in Figure 3 is connected to socket (8) in the vacuum reserve vessel in Figure 4. When the syringe is opened a vacuum causes the cornea to take the shape of the inner surface of the vacuum former bringing the eye sight into focus. The curver may be worn regularly over a prescribed period of time with the aim of obtaining corrected or improved eye sight long term.

Description

CORNEAL CURVERS
This invention concerns to the recurving of the cornea to improve eyesight- There are many methods to reshape the curvature of the cornea in order to improve eye sight. These methods are usually carried out to reduce or remove the need for glasses and contact lenses (short sightedness , long sightedness and astigmatism) and also used to improve deformities and damage to the corneas surface.
According to the present invention for the eye there is provided 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:
(a) one or more vacuum ports , (b) one or more vacuum port gauzes (may prevent blockage and provide a more suitable surface-not described in diagram) , (c) a vacuum passage , (d) a vacuum tube , (e) one or more valves (to maintain a vacuum) , (f) a vacuum relief valve (to prevent excessive vacuum) , (g) a vacuum reserve vessel (to maintain a vacuum) ,(h) a means to apply a vacuum (e.g. a syringe).
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawing in which :
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.
Referring to the drawings (some parts are exaggerated for clarity) 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.
When the syringe is opened gently to create a vacuum , the air draws from the vacuum reserve vessel Figure 4 , the tube 6 , the vacuum passage 4 and from the vacuum ports 5. This moves the cornea, against the inner surface of the vacuum former focusing the eyesight.
If a valve is incorporated into the vacuum former (not described in drawings) then the tube may be removed while maintaining a vacuum but when the vacuum escapes then the vacuum former will no longer be effective.
Otherwise the vacuum reserve vessel can then be secured behind the ear or another suitable place.
For removal the vacuum should be withdrawn from the vacuum former. At this point 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.
It is suggested that 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.

Claims

1. A curver comprises of a vacuum former which may include an outer sealing ring. This sealing ring may be part of the vacuum former moulding or it may be made in as a separate moulding. It may also be made of a different material.
The inner surface of the vacuum former may take the curvature the cornea would be if were to focus eyesight correctly while the outer surface can let the eye lids function normally.
The vacuum former and sealing ring should be constructed of a suitable material . For the vacuum former a hard rigid transparent material is suggested. If the sealing ring is a separate moulding a material ranging from a soft flexible transparent material to a hard rigid transparent material is suggested.
The curver may incorporate any or all of the following: (a) one or more vacuum ports , (b) one or more vacuum port gauzes (may prevent blockage and provide a more suitable surface-not described in diagram) , (c) a vacuum passage , (d) a vacuum tube , (e) one or more valves (to maintain a vacuum) , (f) a vacuum relief valve (to prevent excessive vacuum) , (g) a vacuum reserve vessel (to maintain a vacuum) ,(h) a means to apply a vacuum (e.g. a syringe).
2. A curver as claimed in claim 1 may be applied , washed and generally cared for like contact lenses.
3. A curver as claimed in claims 1 and 2 that when a vacuum is created on its inner surface may change the corneas shape to the shape of the inner surface of the vacuum former thus correcting or improving eye sight.
4. A curver as claimed in claims 1 - 3 may be used for the purpose of correcting or improving short sightedness , long sightedness , astigmatism and perhaps even deformities and damage to the cornea.
5. A curver as claimed in claims 1 - 4 may be worn regularly over a specified period of time with the aim of partially or fully restoring focally corrected eye sight on a long term basis.
6. A curver substantially as described herein with reference to Figures 1 - 4 of the accompanying drawing.
PCT/GB1999/002889 1998-09-02 1999-08-25 Corneal curvers WO2000013630A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99943095A EP1143893A1 (en) 1998-09-02 1999-08-25 Corneal curvers
AU56379/99A AU5637999A (en) 1998-09-02 1999-08-25 Corneal curvers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9819124.0A GB9819124D0 (en) 1998-09-02 1998-09-02 Curvers
GB9819124.0 1998-09-02

Publications (1)

Publication Number Publication Date
WO2000013630A1 true WO2000013630A1 (en) 2000-03-16

Family

ID=10838225

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1999/002889 WO2000013630A1 (en) 1998-09-02 1999-08-25 Corneal curvers

Country Status (4)

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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5690123A (en) * 1996-07-15 1997-11-25 Medina; Antonio Method of altering the shape of the cornea
US5695509A (en) * 1995-03-10 1997-12-09 El Hage; Sami G. Aspherical optical molds for continuous reshaping the cornea based on topographical analysis
WO1998018517A1 (en) * 1996-10-31 1998-05-07 Hellenkamp Johann F A positioning assembly for retaining and positioning a cornea

Patent Citations (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
WO1998018517A1 (en) * 1996-10-31 1998-05-07 Hellenkamp Johann F A positioning assembly for retaining and positioning a cornea

Also Published As

Publication number Publication date
AU5637999A (en) 2000-03-27
GB9819124D0 (en) 1998-10-28
EP1143893A1 (en) 2001-10-17

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