Table 1.

Prevalence of brainstem anesthesia after retrobulbar block.

Study	# of injections	Prevalence (%)
Nicoll et al. (1987) [17]	6000	0.27
Wittpenn et al. (1986) [8]	3123	0.79
Ahn et al. (1987) [16]	∼3000	0.27
Rodman (1987) [19]	200	1.5