Surgery – Instruments – Light application
Patent
1995-06-07
1998-10-27
Shay, David M.
Surgery
Instruments
Light application
606 10, 606 13, 606 17, A61N 502
Patent
active
058272640
ABSTRACT:
A apparatus and method for controlling an apparatus for removing tissue from the eye performs various types of corrections using a relatively large beam, but oscillating, or dithering, that being to prevent reinforcing ridges from being formed during the tissue removal process. Further, various types of correction, such as hyperopia and astigmatism correction, are performed using a large beam that is scanned over the area to be ablated using overlapping shots. Further, the epithelium in the area to be treated is removed using an infrared fluorescent dye to dye the epithelium, and then observing the fluorescent patterns from the epithelium area to be removed. Once a certain area is no longer fluorescent after laser shots, smaller shots are then applied, selectively removing the epithelium from the remaining regions. Again, the fluorescence patterns are observed, and the process is repeated until no epithelium remains. At this point, all of the epithelium is removed, and further a map is created of the initial epithelial thickness at each point in the area from which the epithelium was removed.
REFERENCES:
patent: 4469098 (1984-09-01), Davi
patent: 4665913 (1987-05-01), L'Esperance, Jr.
patent: 4669466 (1987-06-01), L'Esperance
patent: 4695163 (1987-09-01), Schachar
patent: 4718418 (1988-01-01), L'Esperance, Jr.
patent: 4729372 (1988-03-01), L'Esperance, Jr.
patent: 4731516 (1988-03-01), Noguchi et al.
patent: 4732148 (1988-03-01), L'Esperance, Jr.
patent: 4737628 (1988-04-01), Lovoi
patent: 4770172 (1988-09-01), L'Esperance, Jr.
patent: 4773414 (1988-09-01), L'Esperance, Jr.
patent: 4784135 (1988-11-01), Blum et al.
patent: 4788975 (1988-12-01), Shturman et al.
patent: 4798204 (1989-01-01), L'Esperance, Jr.
patent: 4887019 (1989-12-01), Reis et al.
patent: 4911711 (1990-03-01), Telfair et al.
patent: 4941093 (1990-07-01), Marshall et al.
patent: 4953969 (1990-09-01), Fedorov
patent: 4973330 (1990-11-01), Azema et al.
patent: 5061342 (1991-10-01), Jones
patent: 5108388 (1992-04-01), Trokel
patent: 5170191 (1992-12-01), Jones
patent: 5336217 (1994-08-01), Buys et al.
patent: 5520679 (1996-05-01), Lin
Anderson, R. Rox and Parrish, John A., "Selective Photothermolysis: Precise Microsurgery by Selective Absorption of Pulsed Radiation," Science, vol. 220, pp. 524-527, American Association for the Advancement of Science (Apr. 29, 1983).
Thompson, Frank B. and McDonnell, Peter J., "Color Atlas/Text of Excimer Laser Surgery: The Cornea", 1993 Igaku-Shoin Medical Publishers, Inc., pp. 30-33; 41; 53-62; 77-92; 93-103;137-151.
Sher, et al., "Clinical Use of the 193-nm Excimer Laser in the Treatment of Corneal Scars," Arch Ophthalmol-vol. 109, Apr. 1991, pp. 491-498.
L'Esperance, et al., "Excimer Laser Instrumentation and Technique for Human Corneal Surgery," Arch Ophthalmol-vol. 107, Jan. 1989, pp. 131-139.
Hanna, et al., "Excimer Laser Keratectomy for Myopia with a Rotating-Slit Delivery System," Arch Ophthalmol-vol. 106, Feb. 1988, pp. 245-250.
McDonnell, et al., "Photorefractive Keratectomy to Create Toric Ablations for Correction of Astigmatism," Arch Ophthalmol-vol. 109, May 1991, pp. 710-713.
Trokel, et al., "Excimer Laser Surgery of the Cornea," Am. J. Ophthalmology 96:710-715, 1983.
Chiron Technolas GmbH Ophthalmologische Systeme
Shay David M.
LandOfFree
Method of controlling apparatus for modifying the surface of the does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of controlling apparatus for modifying the surface of the, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of controlling apparatus for modifying the surface of the will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1610414