Figure 7. Transmission electron microscopic examination of rabbit retina at 3 months. Ultrastructure of rabbit retina at 3 months after intravitreal injection of PSS (A, B, C, D), 4 mg triamcinolone acetonide (TA; E, F) and 8 mg TA (G, H). No histological changes were verified in all retinas from the groups. The cells of outer nuclear layer (A, E), inner nuclear layer (B, F), inner segment of photoreceptor (C, G), and outer segment of photoreceptor (D, H) were all normal. Bar=2.5 μm in B, D and E, 2.0 μm in A, C, F, G, and H.