Scotomisation is a psychological term for the mental blocking of unwanted perceptions, analogous to the visual blindness of an actual scotoma.
Reviving in the 1920s a term initially used by Charcot in connection with hysteria, the French analysts Rene Laforgue and Edouard Pinchon introduced the idea of scotomisation into psychoanalysis – a move initially welcomed by Freud in 1926 as a useful description of the hysterical avoidance of distressing perceptions. The following year, however, he attacked the term for suggesting that the perception was wholly blotted out (as with a retina’s blind spot), whereas his clinical experience showed that on the contrary intense psychic measures had to be taken to keep the unwanted perception out of consciousness. A debate followed between Freud and Laforgue, further illuminated by Pinchon’s 1928 article on ‘The Psychological Significance of Negation in French’, where he argued that “The French language expresses the desire for scotomisation through the forclusif.”
Decades later in the 1950s, the question of scotomisation re-emerged in a phenological context under the influence of Jacques Lacan. Lacan used scotomisation to represent the ego’s relationship to the unconscious – speaking of “everything that the ego, neglects, scotomizes, misconstrues in…reality” – as well as to challenge Sartre’s concept of the gaze. Most significantly of all, however, he developed it into his influential update of Pinchon’s concept of foreclosure, thus endowing that idea with a conflation of visual and verbal elements.