Diabetes is the leading cause of blindness in the UK in people of working age. Diabetic retinopathy occurs when blood vessels in the retina become blocked, leaky, or grow haphazardly. There are usually no obvious symptoms, making the condition difficult to detect until it is well advanced. However, irreparable damage has been done by this time. This article outlines the importance of screening for early detection of retinopathy, and reviews the targets set in the National Service Framework (NSF) for Diabetes Priorities document (2003) regarding annual retinal screening tests.