Hybrid eye tracking system and associated methods

A - Human Necessities – 61 – F

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A61F 9/01 (2006.01)

Patent

CA 2550483

A system (10) and method for tracking ocular changes (12, 13) during a surgical procedure include directing an eye-safe optical beam (21) toward an undilated, unparalyzed eye (90). A reflected optical beam (23) is detected (22), and measurements (17) are performed based upon data contained in the reflected optical beam of at least one geometric parameter of the eye at a predetermined frequency (105), and from them is calculated a change in the at least one geometric parameter (106). The calculated change is used to dynamically adjust the directing of laser beam shots (14) during the surgery.

L'invention concerne un système et un procédé conçus pour suivre les modifications oculaires au cours d'une procédure chirurgicale, dans lesquels un faisceau optique inoffensif pour l'oeil est dirigé sur un oeil non paralysé et non dilaté. Un faisceau optique réfléchi est détecté, des mesures d'au moins un paramètre géométrique de l'oeil à une fréquence prédéterminée sont effectuées en fonction des données contenues dans le faisceau optique réfléchi, et un changement du ou des paramètres géométriques est calculé à partir de ces mesures. Le changement calculé est utilisé pour régler dynamiquement la direction des décharges de faisceaux laser pendant l'opération chirurgicale.

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