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The increased interest in diabetic retinopathy as a major ophthalmological problem is not confined to this country as evidenced by the publication of this German atlas. The authors, an ophthalmologist and an internist, collaborated in summarizing their experiences on more than 4,000 diabetic patients examined between 1962 and 1965. Now that 40 years have past since the introduction of insulin, the natural history of diabetic retinopathy can be reevaluated in the context of a more normal life span for many diabetics. This reevaluation quickly points up the increasing incidence of the vascular complications of diabetes as the diabetic lives longer. The angiopathy is dominated by the retinal vascular complications. The spectrum of these retinal changes from mild venous dilatation to massive retinitis proliferans is presented in 98 well-reproduced fundus photographs accompanied by detailed case histories. In a series of introductory chapters, the incidence, pathogenesis, and classification of diabetic retinopathy are