Figure 4: Tortuosity Index. (a) Tortuosity index of arterioles, (b) Tortuosity index of venules (no significance difference among groups was found). ERG parameters, (c) a wave amplitude in experimental groups, (d) b wave amplitude in experimental groups, (e) b wave implicit time in experimental groups (no significance among groups was found), (f) a wave latency in experimental groups. Unpaired t-test was used for statistical comparison