Device for laser treatment of a human eye

A method for laser treatment of a human eye, comprising steps of:

• providing pulsed laser radiation;
• directing the laser radiation at a human cornea to be treated;
• controlling a focus of the laser radiation in space and time to:
• generate a corneal flap connected to adjoining corneal tissue in a hinge region and having a flap underside parted-off from adjoining corneal tissue by a bed incision and a lateral incision;
• generate a first auxiliary channel extending from the hinge region to an outer eye surface and adapted to remove gases that develop during the generation of the bed incision, the first auxiliary channel extending to a corneal depth beneath the bed incision;
• generate a second auxiliary channel extending along an edge of the bed incision, wherein the second auxiliary channel is connected to the first auxiliary channel and extends beyond the hinge region, the second auxiliary channel extending into a corneal region beneath the bed incision, the extension of the second auxiliary channel beneath the bed incision distinct from the extension of the first auxiliary channel beneath the bed incision, the second auxiliary channel generated prior to the bed incision and the lateral incision;
• and
• move the focus of the laser radiation along a plurality of mutually parallel, rectilinear scan lines to generate the bed incision, the line directions of the scan lines extending transversely with respect to an imaginary hinge axis of the hinge region, the focus moved to create:
• for a first group of scan lines, a progression of the focus from a scan line to a respectively next scan line of the first group in a first direction, and
• for a second group of scan lines, a progression of the focus from a scan line to a respectively next scan line of the second group in a direction opposite to the first direction.