An ophthalmological device for processing a curved treatment face (C) in eye tissue, the ophthalmological device comprising: a laser source configured to generate a pulsed laser beam (B); a focussing optical module configured to make the pulsed laser beam (B) converge onto a focal spot (S) in or on the eye tissue; a scanner system with a plurality of scan axes configured to move the focal spot (S) to target locations in or on the eye tissue, the scanner system having scan capabilities defined by scan performance characteristics of each particular scan axis; and a circuit configured to use treatment control data to control the scanner system to move the focal spot (S) in or on the eye tissue to target locations along a processing path (t) defined by the treatment control data to process the curved treatment face (C) in the eye tissue; wherein the circuit is further configured to perform a feasibility check, using the treatment control data and the scan performance characteristics of the plurality of scan axes, prior to processing the curved treatment face (C) in eye tissue, perform at least one of: generating an alarm signal or adjusting the treatment control data, in case of a negative outcome of the feasibility check, indicating that moving the focal spot (S) along the processing path (t), defined by the treatment control data, exceeds the scan capabilities of the scanner system , or use the treatment control data to control the scanner system to process the curved treatment face (C) in the eye tissue, in case of a positive outcome of the feasibility check, indicating that moving the focal spot (S) along the processing path (t), defined by the treatment control data, does not exceed the scan capabilities of the scanner system . a laser source configured to generate a pulsed laser beam (B); a focussing optical module configured to make the pulsed laser beam (B) converge onto a focal spot (S) in or on the eye tissue; a scanner system with a plurality of scan axes configured to move the focal spot (S) to target locations in or on the eye tissue, the scanner system having scan capabilities defined by scan performance characteristics of each particular scan axis; and a circuit configured to use treatment control data to control the scanner system to move the focal spot (S) in or on the eye tissue to target locations along a processing path (t) defined by the treatment control data to process the curved treatment face (C) in the eye tissue; wherein the circuit is further configured to perform a feasibility check, using the treatment control data and the scan performance characteristics of the plurality of scan axes, prior to processing the curved treatment face (C) in eye tissue, perform at least one of: generating an alarm signal or adjusting the treatment control data, in case of a negative outcome of the feasibility check, indicating that moving the focal spot (S) along the processing path (t), defined by the treatment control data, exceeds the scan capabilities of the scanner system , or use the treatment control data to control the scanner system to process the curved treatment face (C) in the eye tissue, in case of a positive outcome of the feasibility check, indicating that moving the focal spot (S) along the processing path (t), defined by the treatment control data, does not exceed the scan capabilities of the scanner system . <EOS>