In an apparatus for ophthalmological, in particular refractive, laser surgeryapachymetric measuring device (34) based on an optical-coherenceinterferometricmeasuring process is controlled in such a way that the position of themeasuringbeam emitted by the measuring device (34) follows movements of the eye (10) tobe treated. The eye movements are registered by means of a camera (30) of aneye-tracker. For the purpose of changing the position of the measuring beam, apartially transmitting deflecting mirror (42), via which the measuring beam isrouted onto the eye (10), is movably, in particular tiltably, arranged.
