Patient interface for ophthalmological, optical therapy and diagnosis device

An intermediate element to be arranged between an ophthalmological application head for application of optical radiation of a radiation source and a patient interface, the intermediate element comprising:

• a patient-sided intermediate element interface structure;
• a source-sided intermediate element interface structure,
• wherein the patient-sided intermediate element interface structure comprises a first patient-sided intermediate element coupler and an additional second patient-sided intermediate element coupler,
• wherein the first patient-sided intermediate element coupler forms a first patient interface coupler counterpiece, and the second patient-sided intermediate element coupler forms a second patient interface coupler counterpiece,
• wherein the first patient-sided intermediate element coupler is designed, by establishing a coupling with a first source-sided patient interface coupler of the patient interface, to restrict the mobility of the patient interface relative to the intermediate element, and
• wherein the second patient-sided intermediate element coupler is designed, by establishing a coupling with a second source-sided patient interface coupler of the patient interface while the first patient-sided intermediate element coupler is coupled with the first source-sided interface coupler of the patient interface, to rigidly couple the patient interface to the intermediate element.

An ophthalmological application head for application of optical radiation of a radiation source, comprising:

• a first application head coupler and a second application head coupler, wherein the first application head coupler and the second application head coupler are designed:
• as first patient interface coupler counterpiece for coupling with a first source-sided patient interface coupler of a patient interface to restrict mobility of the patient interface relative to the application head, and as second patient interface coupler counterpiece for coupling with a second source-sided patient interface coupler of the patient interface to rigidly couple the patient interface to the application head while the first patient interface coupler counterpiece is coupled with the first source-sided patient interface coupler;
• or
• as first intermediate element coupler counterpiece for coupling with a first source-sided intermediate element coupler of an intermediate element to restrict mobility of the intermediate element relative to the application head, and as second intermediate element coupler counterpiece to rigidly couple the intermediate element to the application head while the first intermediate element coupler counterpiece is coupled with the first source-sided intermediate element coupler.