EP 2529712 B9 20140910 - Device for the corrective surgery of defective vision of an eye and method for generating control data therefor
Title (en)
Device for the corrective surgery of defective vision of an eye and method for generating control data therefor
Title (de)
Behandlungsvorrichtung zur operativen Fehlsichtigkeitskorrektur eines Auges und Verfahren zum Erzeugen von Steuerdaten dafür
Title (fr)
Dispositif de traitement de correction d'un défaut visuel de l'oeil par opération et procédé de production de données de commande pour ce dispositif
Publication
Application
Priority
- EP 07819732 A 20071109
- DE 102006053120 A 20061110
- US 85820106 P 20061110
Abstract (en)
[origin: WO2008055697A1] A device is described for corrective surgery of defective vision of an eye (3) of a patient (4). The device comprises a laser apparatus (L) that is controlled by a controller (12) and cuts corneal tissue by means of a laser beam (2). In order to focus the laser beam (2) in the cornea (5), the controller (12) steers the laser apparatus (L) towards a target point (28) located in a pattern in the cornea (5), and selects the pattern in such a way that it lies at the boundary of a volume (18) in the cornea (5) which, when removed from the cornea (18), produces the desired correction of defective vision. The controller selects the pattern in such a way that the boundary circumscribes a volume formed such that the cornea (5) less the volume (18) has a radius of curvature R<SUB>CV</SUB>* which satisfies the following equation: R<SUB>CV</SUB>*=1/((1/R<SUB>CV</SUB>)+B<SUB>BR</SUB>/((n<SUB>c</SUB>-1)(1-d<SUB>HS</SUB>·B<SUB>BR</SUB>)))+F, in which R<SUB>CV</SUB> is the radius of curvature of the cornea (5) before the volume (18) is removed, nc is the refractive power of the cornea (5) tissue, F is a factor, B<SUB>BR</SUB> is the refractive power of spectacles (17) capable of correcting defective vision, and d<SUB>HS</SUB> is the distance from the corneal apex at which the spectacles (17) having the refractive power B<SUB>BR</SUB> would have to be located for the spectacles (17) to achieve the desired correction of defective vision.
IPC 8 full level
A61F 9/008 (2006.01)
CPC (source: EP)
A61F 9/008 (2013.01); A61F 9/00829 (2013.01); A61F 9/00838 (2013.01); A61F 2009/00872 (2013.01); A61F 2009/00897 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008055697 A1 20080515; EP 2088977 A1 20090819; EP 2088977 B1 20130911; EP 2088977 B9 20161123; EP 2529712 A1 20121205; EP 2529712 B1 20140108; EP 2529712 B9 20140910
DOCDB simple family (application)
EP 2007009739 W 20071109; EP 07819732 A 20071109; EP 12180466 A 20071109