Apparatus and method for performing laser thermal keratoplasty with minimized regression
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61F-009/007
A61B-018/18
출원번호
US-0410022
(1999-10-01)
발명자
/ 주소
Huang, David
대리인 / 주소
Fleshner & Kim, LLP
인용정보
피인용 횟수 :
38인용 특허 :
11
초록▼
Apparatus and method for preforming laser thermal keratoplasty capable of treating treatment areas with shapes that reduce regression. Both contact and non-contact apparatuses and methods are provided. The apparatus includes laser sources, a projection optical system, observation system, and control
Apparatus and method for preforming laser thermal keratoplasty capable of treating treatment areas with shapes that reduce regression. Both contact and non-contact apparatuses and methods are provided. The apparatus includes laser sources, a projection optical system, observation system, and control system. In some embodiments, the projection system uses two steering mirrors or a mask to control laser beam position on the cornea. This projection system enables precise control of the area of corneal heat shrinkage using relatively low-powered lasers, such as diode lasers. Desired changes in corneal refractive power are produced by selected patterns of photothermal shrinkage of corneal collagen tissue. The selected patterns are arrangements of oblong shapes that are preferably tapered at the ends of the long axis. The oblong shape and tapering distribute tension in the cornea over a wider area of collagen shrinkage and improve the stability of refractive correction. The long axes of the oblong treatment areas are preferably oriented radially for hyperopia correction and circumferentially for astigmatism correction.
대표청구항▼
Apparatus and method for preforming laser thermal keratoplasty capable of treating treatment areas with shapes that reduce regression. Both contact and non-contact apparatuses and methods are provided. The apparatus includes laser sources, a projection optical system, observation system, and control
Apparatus and method for preforming laser thermal keratoplasty capable of treating treatment areas with shapes that reduce regression. Both contact and non-contact apparatuses and methods are provided. The apparatus includes laser sources, a projection optical system, observation system, and control system. In some embodiments, the projection system uses two steering mirrors or a mask to control laser beam position on the cornea. This projection system enables precise control of the area of corneal heat shrinkage using relatively low-powered lasers, such as diode lasers. Desired changes in corneal refractive power are produced by selected patterns of photothermal shrinkage of corneal collagen tissue. The selected patterns are arrangements of oblong shapes that are preferably tapered at the ends of the long axis. The oblong shape and tapering distribute tension in the cornea over a wider area of collagen shrinkage and improve the stability of refractive correction. The long axes of the oblong treatment areas are preferably oriented radially for hyperopia correction and circumferentially for astigmatism correction. Yock, 606/194; US-5454790, 19951000, Dubrul, 604/104; US-5458584, 19951000, Ginn et al., 604/280; US-5458605, 19951000, Klemm, 606/108; US-5480389, 19960100, McWha et al., 604/165; US-5489271, 19960200, Andersen, 604/102; US-5490837, 19960200, Blaeser et al., 604/096; US-5496346, 19960300, Horzewski et al., 606/154; US-5501227, 19960300, Yock, 128/662.06; US-5531700, 19960700, Moore et al., 604/164; US-5536248, 19960700, Weaver et al., 604/054; US-5540236, 19960700, Ginn, 128/772; US-5599299, 19970200, Weaver et al., 604/054; US-5599300, 19970200, Weaver et al., 604/054; US-5626600, 19970500, Horzewski et al., 606/194; US-5693015, 19971200, Walker et al., 604/096.01; US-5706827, 19980100, Ehr et al., 128/772; US-5718680, 19980200, Kraus et al., 604/053; US-5725504, 19980300, Collins, 604/165; US-5788681, 19980800, Weaver et al., 604/280; US-5800414, 19980900, Cazal, 604/280; US-5833706, 19981100, St. Germain et al., 606/194; US-5843028, 19981200, Weaver et al., 604/054; US-5849016, 19981200, Suhr, 606/108; US-5921971, 19990700, Agro et al., 604/280; US-5935114, 19990800, Jang et al.; US-5978699, 19991100, Fehse et al.; US-6007522, 19991200, Agro et al., 604/264; US-6096009, 20000800, Windheuser et al., 604/165; US-6152910, 20001100, Agro et al., 604/523; US-6277100, 20010800, Raulerson et al.; US-6346093, 20020200, Allman et al.
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이 특허에 인용된 특허 (11)
Huang David ; McDonnell Peter J., Apparatus and method for performing laser thermal keratoplasty with minimized regression.
Berry Michael J. ; Hennings David R. ; Vassiliadis Arthur V., Method and apparatus for performing corneal reshaping to correct ocular refractive errors.
Berry, Michael J., System and method for defining and controlling LTK and other surgical eye procedures to produce little or no stromal collagen shrinkage.
Friedman, Marc D.; Kamaev, Pavel; Sherr, Evan; Eddington, William; Rood-Ojalvo, Sara; Muller, David, Systems and methods for corneal cross-linking with pulsed light.
Friedman, Marc D.; Kamaev, Pavel; Muller, David; Pertaub, Radha; Scharf, Ronald; Sherr, Evan; Usher, David, Systems and methods for monitoring time based photo active agent delivery or photo active marker presence.
Friedman, Marc D.; Kamaev, Pavel; Muller, David; Pertaub, Radha; Scharf, Ronald; Sherr, Evan; Usher, David, Systems and methods for monitoring time based photo active agent delivery or photo active marker presence.
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