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The retrobulbar blockade was first described by Herman Knapp in 1884. That same year, Carl Koller reported a case of successful ocular enucleation using cocaine hydrochloride as an anesthetic agent. Years later, Atkinson (1936) described a retrobulbar technique that rapidly became popular; however, the high incidence of complications made this technique obsolete over time. Since then, several anesthesia techniques for ophthalmological surgery have been added to the repertoire of the anesthesiologist. Modern techniques for retrobulbar b