Characteristic retinal appearances occur in diabetes mellitus, the earliest being microaneurysms which are seen as small red dots close to the arteries in the more peripheral parts of the retina.

• 患糖尿病时视网膜呈特征性改变，最早期的改变是在视网膜周边部位靠近动脉处，出现小红点状的微动脉瘤。