A - Human Necessities – 61 – N
Patent
A - Human Necessities
61
N
A61N 5/067 (2006.01) A61F 9/00 (2006.01)
Patent
CA 2322525
The present invention relates to the field of ophthalmology and may be used for increasing the efficiency of therapy of the eye accommodation apparatus pathologies by means of a laser stimulation of the ciliary muscle, that expressed in improving the accommodation ability of the eye, its visual functions and visual working capacity, as well as for reducing discomfort in the process of therapy. Besides, it allows to realize a combined action of the laser radiation: transscleral action upon the ciliary body and, simultaneously, action upon the central region of the retina. The novelty of the invention consisits in using a field of view limiter forming a visual channel and in disposing the forming optics relative to the visual channel axis in a position that provides hitting the laser radiation upon the prelimbic area of the eye during the patient's sight fixing in the direction specified by the visual channel. The device of the present invention comprises an optical unit (1) having lasers (2) (semiconductor lasers), each of which is equipped with the forming optics (3) and serves for providing an action by the laser radiation upon a corresponding zone of the prelimbic area of the eye, and the local field of view limiter (4), which is made in the form of a diaphragm and forms the visual channel (5) specifying the direction of a patient's sight. The diaphragm (4) is located on one axis, being an axis (6) of optical unit (1), with the input aperture (7). The optical unit (1) may further comprise a source (8) of a visible laser radiation optically coupled with the visual channel (5) with a help of a semitransparent mirror (9) to provide an action upon the central region of the retina. The transmittance of the mirror (9) is selected from condition not to hinder the patient in observing a remote object through the output aperture (10) of optical unit (1). It is further provided for a possibility of disposing a diffusing structure (11) allowing the patient to observe a speckle pattern of the laser radiation from the source 8.
Cette invention peut être utilisée lors de la stimulation laser du muscle ciliaire afin d'améliorer les capacités d'adaptation de l'oeil, d'accroître les capacités visuelles et de réduire la gêne lors de la thérapie. Cette invention permet en outre d'appliquer une action combinée par faisceau laser, à savoir une action transsclérale sur le corps ciliaire et sur la zone centrale de la rétine. Ce dispositif comprend une unité optique (1) comportant plusieurs émetteurs laser (2), une optique de formation (3) et un limiteur local (4) du champ de vision qui se présente sous forme d'un diaphragme et qui va former un canal visuel (5) représentant la direction dans laquelle le patient regarde. Le diaphragme (4) est disposé sur le même axe (6) que l'ouverture d'entrée (7). L'unité optique (1) peut comprendre une source (8) de faisceau laser visible qui est connectée par voie optique et par l'intermédiaire d'un miroir semi-transparent (9) au canal visuel (5) de manière à pouvoir agir sur la zone centrale de la rétine. Le coefficient de transmission du miroir (9) est choisi de manière à ne pas empêcher le patient d'observer un objet éloigné à travers l'ouverture de sortie (10) de l'unité (1). Il est également possible de monter une structure (11) de dispersion par diffusion qui permet au patient d'observer un diagramme de taches formé par le faisceau laser provenant de la source (8).
Anikina Elena Borisovna
Turkov Jury Grigorievich
Ashurbekov Nariman
Deeth Williams Wall Llp
Tasr Limited
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