Scot-ERG (scotopic electroretinograph) revealed that the latency of b-wave was most delayed in urethane group and shortest in ketamine group at the standard light intensity.

• 明适应b波潜伏期谷氨酸注射组72h时有所延长，假实验组不随时间延长改变，氯胺酮注射假实验组以及氯胺酮干预组潜伏期缩短;