Treatment device for surgically correcting ametropia of an eye and method for creating control data therefore

摘要

A treatment device for the surgical correction of hyperopia in the eye comprising a laser device controlled by a control device. The laser device separating corneal tissue by applying laser radiation. The control device controls the laser device for emitting the laser radiation into the cornea such that a lenticule-shaped volume is isolated. Removal thereof effects the desired correction. The control device (12) predefines the volume such that a posterior surface and an anterior surface are connected via an edge surface that has a width in projection along the visual axis that is wider than the one which a straight line in the same projection, that is perpendicular at the edge of the posterior or the anterior surface would have relative to the associated surface and connects the anterior surface to the posterior surface or to the perceived extension thereof.

主权项

1. A treatment apparatus for surgical correction of hyperopia in an eye, the treatment apparatus comprising:
a laser device including a laser and scanners, the scanners each comprising mirrors, optics or a combination of mirrors and optics, which is controlled by a control device and which separates corneal tissue by applying laser radiation; the control device being programmed with an algorithm that controls the laser device including the laser and the scanners to emit the laser radiation into the cornea at a focus positioned by operation of the laser and the scanners wherein a lenticular volume is isolated in the cornea, the lenticular volume being structured such that removal of the lenticular volume effects a desired correction of hyperopia; the control device being programmed with an algorithm that controls the laser and the scanners to define the lenticular volume to have a posterior face and an anterior face and edges that are connected via an annular edge face, the edge face having, in projection along an optical axis of the eye, a first ring width that is greater than a second ring width that would be created in the projection along the optical axis of the eye by a straight line extending perpendicularly from an edge of the posterior or the anterior face to the other of the posterior or the anterior face or to an imaginary continuation of the posterior face or the anterior face.