Arrangement (10) to support a surgical treatment of an eye (16), with: - a surgical microscope (30) that is configured to generate an image with at least one representation of a characteristic eye structure, during the performance of a surgical treatment of the eye (16), - a diagnostic apparatus (12) that is configured to collect data from the structure of the eye, the diagnostic apparatus (12) being configured to collect as image structure data from the eye of structures of the iris (20), of an edge of the iris or of the geometry of the limbus, - a data processing unit (24) that is configured for, based on the data of the structure of the eye collected by the diagnostic apparatus (12), generate a structural image that contains at least one representation of the characteristic eye structure as well as at least one position mark arranged in relation to the representation of the structure of the characteristic eye, and - an image data insertion device (32) that is configured to insert the structural image generated by the data processing unit (24) into the image generated by the surgical microscope (30) during the embodiment of the surgical treatment of the eye (16), characterized in that the structural image contains, as a representation of the structure of the characteristic eye, image data of a structure of the selected iris (20), an edge of the iris or the geometry of the limbus in front of a transparent backgroundDisposición (10) para dar soporte a un tratamiento quirúrgico de un ojo (16), con: - un microscopio quirúrgico (30) que está configurado para generar una imagen con al menos una representación de una estructura del ojo característica, durante la realización de un tratamiento quirúrgico del ojo (16), - un aparato de diagnóstico (12) que está configurado para recopilar datos de la estructura del ojo, estando configurado el aparato de diagnóstico (12) para recopilar como datos de la estructura del ojo datos de imagen de estructuras del iris (20), de un bord
