Noncontact laser microsurgical apparatus

Details Noncontact laser microsurgical apparatus Noncontact laser microsurgical apparatus

1991-11-06

1994-01-25

Shay, David M.

Surgery

Instruments

Light application

606 4, 606 13, 606 17, 606 2, A61N 502

Patent

active

052812111

ABSTRACT:
A noncontact laser microsurgical apparatus and method for marking a cornea of a patient's or donor's eye in transplanting surgery or keratoplasty, and in incising or excising the corneal tissue in keratotomy, and for tissue welding and for thermokeratoplasty. The noncontact laser microsurgical apparatus comprises a laser source and a projection optical system for converting laser beams emitted from the laser source into coaxially distributed beam spots on the cornea. The apparatus further includes a multiple-facet prismatic axicon lens system movably mounted for varying the distribution of the beam spots on the cornea. In a further embodiment of the method of the present invention, an adjustable mask pattern is inserted in the optical path of the laser source to selectively block certain portions of the laser beams to thereby impinge only selected areas of the cornea.

REFERENCES:
patent: 4729372 (1988-03-01), L'Esperance, Jr.
patent: 4887592 (1989-12-01), Loertscher
patent: 5152759 (1992-10-01), Parel et al.

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