Quality Assurance in Cataract and Lens Surgery with Special Consideration of Subjective Patient Reported Outcome Measures and Clinical Reported Outcome Measures.

Background: Results of medical interventions must be documented and evaluated. In studies, this is done with clinical outcomes data (clinician/clinical reported outcome measure, CROM). In the past, less weight has been given to patient surveys with questionnaires (patient reported outcome measure, PROM).