"A. Z." is the pseudonym used by the author of "Tratamiento psicoanalítico de un caso de neurosis compulsiva" (Psychoanalytic treatment of a case of compulsive neurosis), a text published in Peru in 1919 in Revista de psyquiatría y disciplinas conexas (Review of psychiatry and associated disciplines).

The first account of psychoanalytic treatment ever published in Spanish, this case history concerned a thirty-year-old patient with a curious "intermittent obsession related to double vision produced by a strabismus resulting from incorrectly performed tenotomies; an obstinate attachment to the false (unclear and deflected) image perceived by the eye affected. The subject felt subjectively attracted by this sensation." Having tried in vain to relieve his malaise in Europe the patient undertook a course of treatment with the author, who came to the conclusion that the patient persisted in seeing the false image in order to...