Importance

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Abstract

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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First Claim