US 12,239,577 B2
Ophthalmological device for 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, 2021, as Appl. No. 17/558,929.
Application 17/558,929 is a continuation in part of application No. 17/130,616, filed on Dec. 22, 2020, granted, now 11,717,442.
Claims priority of application No. 407/21 (CH), filed on Apr. 19, 2021; and application No. 616/21 (CH), filed on May 28, 2021.
Prior Publication US 2022/0192882 A1, Jun. 23, 2022
Int. Cl. A61F 9/008 (2006.01)
CPC A61F 9/00802 (2013.01) [A61F 2009/00851 (2013.01); A61F 2009/00872 (2013.01)] 20 Claims
OG exemplary drawing
 
15. A computer program product comprising a non-transitory computer- readable medium having stored thereon computer program code for controlling a processor of an ophthalmological device which comprises a laser source configured to generate a pulsed laser beam, a focusing optical module, comprising at least one optical lens, configured to make the pulsed laser beam converge onto a focal spot in a cornea of an eye, and a scanner system configured to move the focal spot to target locations in the cornea, whereby the computer program code is configured to control the processor such that the processor:
directs the scanner system to move the focal spot inside the cornea, to generate a void volume inside the cornea, by ablating cornea tissue inside the cornea with partially overlapping focal spots, whereby two or more focal spots partially overlap in direction of each of three dimensions of the void volume, such that each of the focal spots partially overlaps in direction of each of the three dimensions of the void volume with at least one other focal spot, and to move the focal spot inside the cornea to cut in the cornea a venting channel, the venting channel connecting fluidically the void volume to an escape area, to enable venting of gas, produced by generating the void volume inside the cornea, from the void volume through the venting channel to the escape area, whereby the escape area is exterior to the cornea or inside the cornea.