1. A System for examining an eye, comprising: a microscopy system for generating an image plane image of an object region; an OCT system, which is configured to acquire OCT data from the object region which reproduce the object region in different stress states; and a data processing unit which is configured to determine at least one value of a stress-dependent parameter, depending on the OCT data; wherein the system is configured to generate an output image, depending on the image plane image and furthermore depending on the stress-dependent parameter, wherein the data processing unit is furthermore configured: to determine a tissue structure image region, depending on the OCT data, wherein the tissue structure image region represents at least one part of a tissue structure; and to determine the value of the stress-dependent parameter depending on the tissue structure image region determined.