Surgery – Instruments – Light application
Patent
1995-09-05
2000-08-08
Shay, David M.
Surgery
Instruments
Light application
606 3, 606 5, A61N 502, A61N 506
Patent
active
06099522&
ABSTRACT:
A method, apparatus and system for template-controlled, precision laser interventions is described that greatly improves the accuracy, speed, range, reliability, versatility, safety, and efficacy of interventions such as laser microsurgery, particularly ophthalmic surgery, and industrial micromachining. The instrument and system are applicable to those specialties wherein the positioning accuracy of laser lesions is critical, wherever accurate containment of the spatial extent of a laser lesion is desirable, and/or whenever precise operations on a target or series of targets subject to movement during the procedure are to be effected. The system thus comprises the following key elements: (1) a user interface, consisting of a video display, microprocessor and controls, (2) an imaging system, which may include a surgical video microscope with zoom capability, (3) an automated 3D target acquisition and tracking system that can follow the movements of the subject tissue, for example an eye, during the operation, thus allowing the surgeon/user to predetermine his firing patern based on an image which is automatically stabilized over time, (4) a laser, with which can be focused so that only the precise lesions described by the user interface are effected, (5) a diagnostic system, incorporating a mapping and topography means for measuring precise surface shapes prior to and subsequent to a procedure, said measurements to be executed on-line within time scales not limited to human response times, and (6) a fast reliable safety means, whereby the laser firing is interrupted automatically, should any conditions arise to warrant such interruption of the procedure.
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"Eye tracking for image stabilization" by Jean et al: Lasers on Opthalmol vol. 1, No. 4 pp. 147-204 1987.
Fountain William D.
Knopp Carl F.
Orkiszewski Jerzy
Persiantsev Michael
Sklar H. Alfred
Barrish, Esq. Mark D.
Shay David M.
VISX Inc.
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