Compared apoptosis cell in TTT group with normal group,there was no significant difference (P=0.882),but the amount of cell on RGC layer in TTT group was obviously declined(P=0.001).

• TTT组与正常对照组比较RGC层细胞凋亡数量无显著性差异(P=0.；882)；但RGC层细胞数明显少于正常对照组(P=0