WO1998040041A2 - Simulating a laser treatment on the eye by pretreating a contact lens - Google Patents
Simulating a laser treatment on the eye by pretreating a contact lens Download PDFInfo
- Publication number
- WO1998040041A2 WO1998040041A2 PCT/EP1998/001351 EP9801351W WO9840041A2 WO 1998040041 A2 WO1998040041 A2 WO 1998040041A2 EP 9801351 W EP9801351 W EP 9801351W WO 9840041 A2 WO9840041 A2 WO 9840041A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- eye
- lens
- laser
- contact lens
- treatment
- Prior art date
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
- A61F9/008—Methods or devices for eye surgery using laser
-
- 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
- A61F9/008—Methods or devices for eye surgery using laser
- A61F9/00802—Methods or devices for eye surgery using laser for photoablation
- A61F9/00812—Inlays; Onlays; Intraocular lenses [IOL]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00681—Aspects not otherwise provided for
- A61B2017/00707—Dummies, phantoms; Devices simulating patient or parts of patient
-
- 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
- A61F9/008—Methods or devices for eye surgery using laser
- A61F2009/00861—Methods or devices for eye surgery using laser adapted for treatment at a particular location
- A61F2009/00872—Cornea
-
- 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
- A61F9/008—Methods or devices for eye surgery using laser
- A61F2009/00878—Planning
- A61F2009/00882—Planning based on topography
Definitions
- the invention generally relates to vision correction through laser treatment of the eye, and more specifically to a method of pretesting a laser treatment by first performing the treatment on a contact lens that is then worn by the patient.
- a laser treatment pattern is pretested before actually being performed on the patient's eye.
- a proposed treatment pattern is developed based on the patient's vision, eye topography, or other criteria, and then a contact lens blank is provided that reacts to laser treatment similarly to how the patient's eye will react to that treatment.
- the contact lens is placed under the laser system and ablated or otherwise eroded by the laser according to the proposed treatment pattern.
- the lens is then placed on the patient's eye, and the effect of the treatment pattern is assessed.
- Either the concave or convex surface of the lens can be ablated, and either the treated surface or the untreated surface can be placed against the patient's eye.
- the treated surface is placed against the patient's eye, so that a topography system can then assess the curvature of the lens as it sits on the patient's eye.
- the lens can be weighted to allow for asymmetric or aspherical treatment patterns, such as for astigmatism or other irregular shapes.
- the power of the laser system can be adjusted so that the resulting refractive effect on the lens blank corresponds to the refractive effect that will occur when the patient's cornea is treated.
- the treatment pattern can be diverged, for example, onto spectacle lens blanks. Marks can be placed on either the contact lens blank or the spectacle lens blank to assure proper alignment within the excimer system.
- an excimer laser system is used.
- the treatment is then performed on the patient's eye, such as through PRK (photo refractive keratectomy) or through LASIK (laser in situ keratomileusis). If the results are not acceptable, the proposed treatment pattern is modified based on the patient's resulting visual acuity and topography. Then, either a new lens blank is treated, or the existing pretreated lens blank is further treated with the difference between the original treatment pattern and the new treatment pattern. This process is repeated until the patient's resulting vision falls within acceptable limits.
- PRK photo refractive keratectomy
- LASIK laser in situ keratomileusis
- Figure 2 is a flowchart illustration of the steps for pretesting a laser treatment according to the invention
- Figure 3 is an alternative technique for creating a pretreatment contact lens according to the invention.
- Figures 6A and 6B are alternative contact lens blank profiles for use in the technique according to the invention.
- This testing yields eye profile data 204 in a step 102.
- This profile data 204 will typically include a topographic map of the irregularities of the surface of the eye, along with a degree of overall dioptric correction necessary, such as -5.00 diopters.
- ophthalmologists on their own or through a service, develop treatment profiles for correcting the vision of the eye E in a step 104.
- the treatment profile developed typically depends on the type of eye surgery that is going to be performed and with what type of laser surgery system.
- a simple profile may correct for a certain degree of myopia, with no irregularities being corrected and no astigmatic correction.
- a more complex profile may remove an irregular astigmatism from the eye E surface along with providing an overall correction for myopia or hyperopia.
- a treatment profile is developed for a Keracor® 117 or Keracor® 217 excimer laser eye surgery system.
- Keracor® 117 or Keracor® 217 excimer laser eye surgery system are sold by Chiron Technolas GmbH of Kunststoff, Germany. These systems, sold by Chiron Technolas GmbH of Kunststoff, Germany, use a "piano scan" technique described in U.S. patent application Serial No. 08/324,782, which is hereby incorporated by reference.
- a contact lens 212 is placed at the focal path of the disclosed excimer laser system 210, and the treatment is performed on the contact lens 212.
- This contact lens 212 can be of a variety of materials, such as a polymer.
- Etafilcon A used in Acuvue Contact Lenses from Johnson & Johnson.
- the material can be flexible or rigid, and can have a similar ablation characteristic to that of the comea of the eye E resulting in a similar degree of refractive correction when the treatment pattern of the laser system 210 is applied.
- step 300 a procedure for appropriate vision correction is generated.
- step 302 the underside of a piano (i.e., zero refractive correction) contact lens is treated with the excimer laser surgery system 210 for appropriate vision correction. If the underside is treated, and the underside is to be placed towards the eye, actually a mirror image of the ultimately desired treatment pattern must be applied to the underside of the contact lens 214.
- step 304 the lens 214 is placed on the eye, and then at step 306, visual acuity and topography are measured. Proceeding to step 308, it is determined whether the visual acuity is within acceptable limits. If so, control proceeds to 310 where the eye E is treated. If not, control proceeds to step 312, where the treatment is adjusted accordingly, and control proceeds to step 302.
- lenses for spectacles 230 and 232 are lenses for spectacles 230 and 232. These lenses can be used as an alternative to the contact lenses 220 or 212. In this case, the material is removed from the spectacle lenses 230 and 232, yielding a removed area 234 and 236. Referring back to Figure 3 and step 106 of Figure 1, it will be appreciated that to form an appropriate correction on the lenses 230 and 232, the treatment pattern must be expanded through some optical technique or through computer control. In any case, these lenses 230 and 232 can alternatively be used to pretest the treatment. In this case, the lenses are preferably made of a clear, hard material, such as PMMA.
- the contact lens 212 or 220 can be placed on the patient's eye E before the treatment is performed on the contact lens 212 or 220. This reduces misalignment, because the patient would be asked to focus on an eye fixation point, and the treatment will thus be self- aligning, because the alignment would be the same as if the contact lens 212 or 220 were absent. This technique could be used either with or without inverting the lens before performing the visual acuity/topography testing.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU74268/98A AU7426898A (en) | 1997-03-10 | 1998-03-09 | Simulating a laser treatment on the eye by pretreating a contact lens |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/814,435 | 1997-03-10 | ||
US08/814,435 US5941874A (en) | 1997-03-10 | 1997-03-10 | Simulating a laser treatment on the eye by pretreating a contact lens |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998040041A2 true WO1998040041A2 (en) | 1998-09-17 |
WO1998040041A3 WO1998040041A3 (en) | 1998-12-10 |
Family
ID=25215048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/001351 WO1998040041A2 (en) | 1997-03-10 | 1998-03-09 | Simulating a laser treatment on the eye by pretreating a contact lens |
Country Status (3)
Country | Link |
---|---|
US (1) | US5941874A (en) |
AU (1) | AU7426898A (en) |
WO (1) | WO1998040041A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006127173A2 (en) | 2005-05-20 | 2006-11-30 | Visx, Incorporated | Scleral lenses for custom optic evaluation and visual performance improvement |
DE102008028509A1 (en) | 2008-06-16 | 2009-12-24 | Technolas Gmbh Ophthalmologische Systeme | Treatment pattern monitoring device |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6086204A (en) * | 1999-09-20 | 2000-07-11 | Magnante; Peter C. | Methods and devices to design and fabricate surfaces on contact lenses and on corneal tissue that correct the eye's optical aberrations |
DE19954523C2 (en) * | 1999-11-12 | 2002-01-31 | Johannes Junger | Process for surface treatment of a contact lens for individual adaptation to the eye system |
CN1177243C (en) | 2000-06-27 | 2004-11-24 | 佳视科学公司 | Contact lens, its mfg. and prepn. method and computer programmed products |
CA2422855C (en) * | 2000-09-21 | 2012-01-03 | Visx, Inc. | Enhanced wavefront ablation system |
US7156859B2 (en) * | 2001-07-23 | 2007-01-02 | Fos Holding S.A. | Device for separating the epithelium layer from the surface of the cornea of an eye |
AU2003216240A1 (en) * | 2002-02-11 | 2003-09-04 | Visx, Inc. | Closed loop system and method for ablating lenses with aberrations |
US20030223954A1 (en) * | 2002-05-31 | 2003-12-04 | Ruscio Dominic V. | Polymeric materials for use as photoablatable inlays |
US20110144629A1 (en) * | 2009-12-10 | 2011-06-16 | Rupert Veith | Method for Complementing Conventional Vision Correction with Laser Correction of the Cornea |
US9138349B2 (en) | 2010-12-10 | 2015-09-22 | Wavelight Gmbh | Laser device, in particular, for ophthalmological laser surgery |
WO2013059331A1 (en) | 2011-10-17 | 2013-04-25 | Digisight Technologies, Inc. | System and method for providing analysis of visual function using a mobile device with display |
US9462941B2 (en) * | 2011-10-17 | 2016-10-11 | The Board Of Trustees Of The Leland Stanford Junior University | Metamorphopsia testing and related methods |
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EP0785761A1 (en) | 1994-10-14 | 1997-07-30 | Chiron/Technolas Gmbh Ophthalmologische Systeme | Excimer laser system for correction of vision |
WO1997046183A1 (en) | 1996-05-30 | 1997-12-11 | Chiron/Technolas Gmbh Ophtalmologische Systeme | Distributed excimer laser surgery system |
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- 1997-03-10 US US08/814,435 patent/US5941874A/en not_active Expired - Lifetime
-
1998
- 1998-03-09 AU AU74268/98A patent/AU7426898A/en not_active Abandoned
- 1998-03-09 WO PCT/EP1998/001351 patent/WO1998040041A2/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US4840175A (en) | 1986-12-24 | 1989-06-20 | Peyman Gholam A | Method for modifying corneal curvature |
US5634920A (en) | 1992-10-01 | 1997-06-03 | Chiron Technolas Gmbh Ophthalmologische Systeme | Method and apparatus for removing epithelium from the surface of the eye |
EP0785761A1 (en) | 1994-10-14 | 1997-07-30 | Chiron/Technolas Gmbh Ophthalmologische Systeme | Excimer laser system for correction of vision |
WO1997046183A1 (en) | 1996-05-30 | 1997-12-11 | Chiron/Technolas Gmbh Ophtalmologische Systeme | Distributed excimer laser surgery system |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006127173A2 (en) | 2005-05-20 | 2006-11-30 | Visx, Incorporated | Scleral lenses for custom optic evaluation and visual performance improvement |
EP1881797A2 (en) * | 2005-05-20 | 2008-01-30 | Visx, Incorporated | Scleral lenses for custom optic evaluation and visual performance improvement |
JP2008540030A (en) * | 2005-05-20 | 2008-11-20 | ヴィスクス インコーポレイテッド | Sclera lens for custom visual evaluation and visual function improvement |
EP1881797A4 (en) * | 2005-05-20 | 2010-05-19 | Amo Mfg Usa Llc | Scleral lenses for custom optic evaluation and visual performance improvement |
DE102008028509A1 (en) | 2008-06-16 | 2009-12-24 | Technolas Gmbh Ophthalmologische Systeme | Treatment pattern monitoring device |
Also Published As
Publication number | Publication date |
---|---|
WO1998040041A3 (en) | 1998-12-10 |
AU7426898A (en) | 1998-09-29 |
US5941874A (en) | 1999-08-24 |
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