Magnetic resonance imaging of the optic nerve in extremes of gaze. Implications for the positioning of the globe for retrobulbar anaesthesia.

Orbital magnetic resonance imaging was carried out in nine directions of gaze in a normal subject. The findings are presented and discussed especially in relation to retrobulbar injections. Atkinson9s position is confirmed to be hazardous and a new position for the globe at retrobulbar injections is suggested.