US 11,717,442 B2
Ophthalmological device and method for surgical treatment of a cornea
Michael Steinlechner, Zurich (CH); Christian Rathjen, Bremen (DE); and Werner Bernau, Köniz (CH)
Assigned to Ziemer Ophthalmic Systems AG, Port (CH)
Filed by Ziemer Ophthalmic Systems AG, Port (CH)
Filed on Dec. 22, 2020, as Appl. No. 17/130,616.
Prior Publication US 2022/0192870 A1, Jun. 23, 2022
Int. Cl. A61F 9/008 (2006.01)
CPC A61F 9/008 (2013.01) [A61F 2009/00851 (2013.01); A61F 2009/00872 (2013.01); A61F 2009/00897 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ophthalmological device for surgical treatment of a cornea of an eye, the ophthalmological device comprising:
a patient interface, the patient interface comprising a contact body and at least one suction element configured to fix the contact body to the cornea for contacting the cornea in a contact zone, where the contact body is in contact with an exterior surface of the cornea;
a laser source configured to generate a pulsed laser beam;
a focusing optical module configured to make the pulsed laser beam converge onto a focus in the cornea;
a scanner system configured to move the focus to target locations in the cornea; and
an electronic circuit configured to control the scanner system to move the focus to cut inside the cornea a lenticule, the lenticule having a posterior lenticule surface and an anterior lenticule surface,
wherein the electronic circuit is further configured to control the scanner system to move the focus to cut in the cornea a venting channel, the venting channel comprising an opening incision in a peripheral area of an exterior surface of the cornea, outside a perimeter of the lenticule from a top view perspective onto the cornea and outside the contact zone, and the venting channel connecting fluidically at least one of the posterior lenticule surface or the anterior lenticule surface to the opening incision, to enable venting of gas produced by cutting the lenticule inside the cornea through the opening incision to the exterior of the cornea outside the contact zone,
wherein the electronic circuit is further configured to control the scanner system to move the focus along a work trajectory to cut the venting channel and at least one of the posterior lenticule surface or the anterior lenticule surface in a continuous movement of the focus along the work trajectory leading from the venting channel onto the posterior lenticule surface or the anterior lenticule surface.