Adopting 3-Year Screening Intervals for Sight-Threatening Retinal Vascular Lesions in Type 2 Diabetic Subjects Without Retinopathy

June 2011
Diabetes Care;Jun2011, Vol. 34 Issue 6, p1318
Academic Journal
OBJECTIVE--To report the incidence of sight-threatening vascular lesions in type 2 diabetic subjects without retinopathy after adopting a 3-year interval screening program. RESEARCH DESIGN AND METHODS--In all, 1,691 type 2 diabetic subjects with no detectable retinopathy in two 50° red-flee fundus photographs were scheduled for follow-up with photography 3 years later. Age at diabetes diagnosis was 60 ± 12 years, and known duration of diabetes was 6 ± 6 years. Treatment consisted of diet only (26%), oral agents (54%), and oral agents and/or insulin (20%). Glycated hemoglobin A1c was 6.4 ± 1.5%. RESULTS--Of the 1,322 subjects available for follow-up, 73% were still without retinopathy after 3 years, and 28% had developed mild or moderate retinopathy, but none developed severe nonproliferative or proliferative retinopathy. Macular edema requiring laser coagulation occurred in only one eye. CONCLUSIONS--Three-year retinal screening intervals can be recommended in subject with mild type 2 diabetes and no retinopathy.


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