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Low-concentration ligustrazine had a protective effect on RGCs after retinal I/R injury. After incubation with different concentrations of ligustrazine (0, 5, 10, 20, 40, 80, 160, or 320 μg/mL), CCK-8 assay was perfumed to verify the effect of ligustrazine on the cell viability of RGCs after retinal I/R injury. **p< 0.01 vs. normal group; ##p< 0.01 vs. model group
