Biconic ablation with controlled spherical aberration

Details Biconic ablation with controlled spherical aberration Biconic ablation with controlled spherical aberration

A - Human Necessities

61

F

A61F 9/01 (2006.01) A61B 3/107 (2006.01) A61B 18/20 (2006.01)

Patent

CA 2490997

A laser vision correction ablation algorithm relies upon the central radius of curvature and a biconic shape factor of a pre-operative and a post-operative anterior corneal surface. The post-operative shape factor is selected to provide a spherical aberration value that is optimized for a particular patient or for a particular patient population group. The algorithm is embodied as a readable, executable instruction in a device readable medium. The algorithm further sets forth a method for laser vision correction.

L'invention concerne un algorithme d'ablation de correction visuelle par laser fondé sur le rayon central de courbure et sur un facteur de forme biconique d'une surface cornéenne antérieure préopératoire et postopératoire. Le facteur de forme postopératoire est sélectionné pour obtenir une valeur d'aberration sphérique qui est optimalisée pour un patient spécifique et un groupe de patients en particulier. L'algorithme selon l'invention est mis en oeuvre sous la forme d'une instruction lisible et exécutable stockée sur un support exploitable par machine. Cette invention concerne en outre un procédé de correction visuelle par laser.

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