Device for treating eye tissue

Ophthalmic device for treating eye tissue by means of laser pulses, comprising:

• a base station,
• a first light source arranged in the base station and configured to generate the laser pulses,
• a light projector for focused projection of the laser pulses into the eye tissue, wherein the light projector is movable in relation to the first light source in such a way that a length of a light-transmission path from the first light source to the light projector is changeable, wherein the light projector is connected to the base station via an arm,
• an interferometric measurement system configured to measure eye structures,
• a reflecting optical element, which is movable in relation to the first light source and provided for preventing a change in a path length difference, between a measurement arm and a reference arm of the interferometric measurement system, as a result of a change in the length of the light-transmission path, caused by a movement of the light projector, wherein the reflecting optical element is arranged in the reference arm, and wherein the reflecting optical element is arranged in the base station, and
• a control module and a movement driver, which are configured to displace the reflecting optical element in the base station, for compensating the movement of the light projector, in such a way that a path length of the reference arm is adapted in accordance with the change in the length of the light-transmission path caused by the movement of the light projector.