Table 1

 Classification of diabetic retinopathy and outcome from the UK National Screening Committee on photograph grading guidelines

ClassificationFeaturesOutcome of screening
Preproliferative is the equivalent of moderate to very severe non-proliferative retinopathy.
DD, disc diameter; IRMA, intraretinal microvascular abnormalities.
NoneNo diabetic retinopathyAnnual screening
BackgroundMicroaneurysm(s) identified clinicallyAnnual screening
Retinal haemorrhage(s) +/- any exudatesAnnual screening
PreproliferativeVenous beadingRefer
Venous loop or reduplicationRefer
Multiple deep, round haemorrhagesRefer
Cotton wool spotsRefer
ProliferativeNew vessels at discRefer
New vessels elsewhereRefer
Preretinal or vitreous haemorrhageRefer
Preretinal fibrosis or tractional detachmentRefer
MaculopathyExudate within 1 DD of foveaRefer
Circinate or group of exudates within maculaRefer
Any microaneurysm or haemorrhage within 1 DD of foveaRefer
PhotocoagulationFocal or macular gridRefer
Peripheral scatterRefer
Other lesionNon-diabetic pathology