Device for correcting the shape of an object by laser treatment

Details Device for correcting the shape of an object by laser treatment Device for correcting the shape of an object by laser treatment

1992-04-27

1994-02-08

Shay, David M.

Surgery

Instruments

Light application

606 10, 606 12, 606 13, 2191216, 21912167, 21912173, 21912174, 2191218, A61N 506

Patent

active

052844773

ABSTRACT:
The invention concerns a device for correcting the shape of an object by laser treatment.
The device comprises means (1) for emitting a laser beam (FL) and means (2) for generating a treatment laser beam (FLT) comprising at least one lobe of elongate cross-section. Means (3) enable focussing of the image of the lobe or lobes of the treatment laser beam on the area of the object (OE) to be corrected and means (4) enable displacement of the image of the lobe of the treatment laser beam in translation or in rotation over the area of the object to be corrected. The total correction or ablation is effected by the summation of a plurality of elementary discrete ablations.
Application to refractive surgery in the case of keratomileusis for myopia, hypermetropia or astigmatism, and to shaping contact lenses and intra-ocular implants.

REFERENCES:
patent: 4579430 (1986-04-01), Bille
patent: 4584424 (1986-05-01), Vaguine
patent: 4648400 (1987-03-01), Schneider et al.
patent: 4665913 (1987-05-01), L'Esperance
"A Rotating Slit Delivery System for Excimer Laser Refractive Keratoplasty" by Hanna et al; Am. J. Ophthal. Mar. 1987, p. 474.
"Excimer Laser Refractive Keratoplasty" by Hanna et al; Nov. 1986 pp. 1-16.

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