Device for cutting a flap in the cornea of an eye

Details Device for cutting a flap in the cornea of an eye Device for cutting a flap in the cornea of an eye

A - Human Necessities

61

F

A61F 9/01 (2006.01)

Patent

CA 2756984

An apparatus for cutting a flap in the cornea of an eye (10) exhibits the following: a laser radiation source for generating laser radiation, means for shaping and guiding the laser radiation in relation to the cornea (20) in such a manner that in the cornea an incision (28) arises which enables a folding of the flap (26) upwards from the cornea. In the process the incision (28) is guided in the hinge region (22) of the cornea in such a way that an undercut arises under the hinge region (22). By this means it is ensured that, in particular in the case of an fs LASIK, the intervention into the stroma is effected substantially symmetrically in relation to a central axis of the cornea (20), so that no undesirable deformations of the cornea result post-operatively by reason of the intraocular pressure.

Dispositif de découpe d'un volet cornéen dans l'oeil comportant les éléments suivants: une source de rayonnement laser destinée à générer un faisceau laser, des moyens de formation et de guidage du faisceau laser relativement à la cornée (20) de manière à former dans la cornée une incision (28) qui permet d'ouvrir le volet cornéen (26). L'incision (28) est réalisée dans la zone charnière (22) de la cornée de façon à former une coupure (30) sous la zone charnière (22). L'invention permet ainsi, notamment lors d'un Fs-LASIK, d'effectuer une intervention dans le stroma de manière sensiblement symétrique relativement à un axe central de la cornée (20) afin d'éviter, après l'opération, des déformations indésirables de la cornée dues à la pression intraoculaire.

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