A: Representative images of apoptosis in the retina from a control rat, a diabetic rat treated with vehicle eye drops (Diabetes-sham),
and a diabetic rat treated with SST eye drops (Diabetes-SST). B: Percentage of apoptotic cells in the whole retina and in the retinal layers in each group. Results are expressed as means
± SD. INL, inner nuclear layer. *P < 0.05 in comparison with control and diabetic SST treatment groups. Scale bar = 50 μm.