The end of the 20th century inaugurates the tele-techno-media dimension that gives place to subjective mutation of incalculable effects. These transformations crucially affect adolescents and youths, for this new dimension promotes a planetary enlargement of the non-family influences which act directly on idealness. Held between the illusionary temptation of the ideal-ego and the possibility of living the ego ideal, the adolescent suffers through the confrontation with this colossal identifying, fragmented and voracious mirror. The author then discusses what the psychoanalyst can do.