Syringe needles were inserted through both the new and old pathways on fresh speciment of human body, and CT tests were made to scan these two pathway layer by layer .

• 以人体新鲜标本从新、老入路各插入针头、CT扫描查与眼球及睫状神经节的距离,老人路后段距眼球太近,易损伤;