The program intertwines three differences that are carefully guarded borders across institutions, discourses and aesthetics too. Can the transformations of these borders and moments of politicization be understood, problematized, illuminated on the basis of film examples from the past 40 years? Which strategies and concepts existed and exist still to translate the demarcations and their social inclusion and exclusion in a dialectic visual space? One difference is that between normality and pathology or insanity, the second is between the modern and the pre- or non-modern. The meridian here is the claim of a line made of transition points and medial effects, which enable a particular approach to asymmetric relations and a corresponding optical concept of history. A lecture featuring film excerpts. (9.6.)