None | No diabetic retinopathy | Annual screening |
Background | Microaneurysm(s) identified clinically | Annual screening |
| Retinal haemorrhage(s) +/- any exudates | Annual screening |
Preproliferative | Venous beading | Refer |
| Venous loop or reduplication | Refer |
| IRMA | Refer |
| Multiple deep, round haemorrhages | Refer |
| Cotton wool spots | Refer |
Proliferative | New vessels at disc | Refer |
| New vessels elsewhere | Refer |
| Preretinal or vitreous haemorrhage | Refer |
| Preretinal fibrosis or tractional detachment | Refer |
Maculopathy | Exudate within 1 DD of fovea | Refer |
| Circinate or group of exudates within macula | Refer |
| Any microaneurysm or haemorrhage within 1 DD of fovea | Refer |
Photocoagulation | Focal or macular grid | Refer |
| Peripheral scatter | Refer |
Other lesion | Non-diabetic pathology | |