dot and blot haemorrhages (background diabetic retinopathy)
This is the most common type of diabetic retinopathy affecting 14% of diabetics (1).
- the Wisconsin Epidemiologic Study of Diabetic Retinopathy reported that background diabetic retinopathy (microaneurysms and haemorrhages) was present in nearly all subjects with type 1 diabetes of 20 years' duration, and in 80% of those with type 2 diabetes of a similar duration (2).
- pathology is intraretinal
- lesions are often situated between the main temporal arterial arcades.
Background diabetic retinopathy is graded as level R1 in the UK National Screening Committee (NSC) grading criteria (3)
- (1) BMJ (1993), 306, 189-92
- (2) Shotliff K. and Duncan G. Diabetic retinopathy: summary of grading and management criteria. Pract Diab Int, 2006;23: 418–420
- (3) The Royal College of Ophthalmologists (RCOphth) 2012. Diabetic retinopathy guidelines
Last reviewed 01/2018