Surgery – Instruments – Light application
Patent
1994-10-19
1996-10-29
Sykes, Angela D.
Surgery
Instruments
Light application
606 5, 606 17, A61N 506
Patent
active
055692389
ABSTRACT:
The present invention discloses an optical system for performing a laser photorefractive keratectomy operation on a cornea for vision correction. The optical system comprises a laser source emitting a laser beam. The optical system also includes a beam processing subsystem for receiving and processing the laser beam for generating a processed laser beam suitable for performing the keratectomy operation. The optical system further includes an energy delivery subsystem including a continuous energy-delivery control device which may include time-varying movable slits, rotating diaphragms, or combination of lens system with moving screen, for optically controlling the energy delivered to different areas of the cornea by the processed laser beam for performing the vision correction.
REFERENCES:
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patent: 4729372 (1988-03-01), L'Esperance, Jr.
patent: 4911711 (1990-03-01), Telfair et al.
patent: 5376086 (1994-12-01), Khoobehi et al.
patent: 5411501 (1995-05-01), Klopotek
patent: 5461212 (1995-10-01), Seiler et al.
patent: 5470329 (1995-11-01), Sumiya
patent: 5505723 (1996-04-01), Muller
Fang Ta-Ming
Shei Sun-Sheng
Harris-Ogugua Sonya
Sykes Angela D.
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