In Group B,the observation under optical microscope showed vitreous degeneration of retinal central arte- riole,kidney arteriole and spleen arteriole.

• A 组视网膜、肾脏、脾脏血管形态和组织结构正常,B 组小动脉壁呈均质玻璃样变性,C 组血管结构基本正常。