Between the lower rim of external canthalligament, the external orbit wall and the eyeball, from the orbit margin to the front end of the superior orbital fissure, there is a 35mm deep passageway, which is called the new pathway of retrobulbar anesthesia.

• 外眦韧带结节下缘；眶外侧壁角与眼球之间；从眶缘至眶上裂前端35mm的间隙；称球后麻醉新入路.