An apparatus for measuring optical properties of an object—such as, in particular, an eye—comprises a wavefront sensor for surveying wavefront aberrations generated by the object and an optical coherence tomograph, so that both wavefront aberrations and structures of the object can be surveyed. For this purpose a broadband laser radiation-source is provided for the OCT. A reference beam is generated with a retroreflector, and a beam-splitter serves as optical component both for the wavefront determination and for the OCT.