Lasag Ag

Taoufik Nouri

Ulrich Durr

Jurg Steinger

An apparatus having a first generator designed to produce a first beam of coherent light, the energy of which is concentrated in a succession of impulses each capable causing a microexplosion in organic tissue at the point to be treated, a second generator designed to produce a second beam of coherent light able to penetrate the thickness of this organic tissue, an optical system designed to focus the first or the second beam on the point to be treated and a beam switch able to selectively direct the first or the second beam towards the optical system. The second beam enables ophthalmologists to perform operations that could not hiterto be performed with know apparatuses, notably operations involving the penetration of a treatment beam into the thickness of the tissues of the eye.

Apparatus for the surgical treatment of a point situated in an eye

The arrangement of this invention concerns a surgical apparatus, in particular for ophthalmological use. In addition to a power beam it includes a beam of coherent visible light (29) which is transformed into at least one elementary beam (30) by means of a homogeneous light guide (21). The guide, which may be an optical fiber, is fixed to a rotating element (33) rotating about an axis (2). When the element rotates the elementary beam generates a luminous tubular beam intended to surround the power beam, the whole then being focussed by a lens to a point terminating a treatment cone with a predetermined vertex angle. The rotating element may include means for varying the diameter of the luminous tubular beam such as a transporter (39) bearing one end of the optical fiber and responding to the operation of a screw (45). The arrangement permits, on one hand to localize a point of treatment in the eye and, if necessary, modification of the vertex angle of the treatment cone.

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Oberhofen, Switzerland

Taoufik Nouri