A device for superimposing parameters and/or image data in the stereoscopic observation path of ophthalmological devices relates to an apparatus for reflecting relevant parameters and/or image data into the stereoscopic observation beam path of ophthalmic devices, for example for therapeutic laser treatments of an eye. The device includes an additional micro-display, which is connected to the control unit, and a beam deflection element for reflecting the parameters and/or image data shown on the micro-display into the stereoscopic observation beam path, which are for example arranged in the parallel beam path. Even though the apparatus is intended for ophthalmic devices for therapeutic laser treatment in the eye, it can also be used, in principle, for ophthalmic devices for examination, diagnosis and surgical interventions.