Occlusion of the sound eye (conventional occlusion) introduced by Buffon (I 743) was the only treatment for amblyopia until Bangerter (I953) introduced occlusion of the amblyopic eye (non-conventional or inverse occlusion) combined with pleoptic treatment in cases of amblyopia with eccentric fixation. Mackensen, Kroner, and Postic (I965), von Noorden (I965), Posti6 (I966), Borgmann and Dielefel...