RxMx grading system for diabetic retinopathy
Last edited 05/2023
The images of retinas taken at screening are graded according to national protocol using the RxMx grading system definitions:
R0 = No retinopathy
R1 = Background retinopathy
R2 = Pre-proliferative retinopathy
R3A = Active proliferative retinopathy
R3S = Stable proliferative retinopathy
M0 = No maculopathy
M1 = Maculopathy
A lead clinician in each local screening service determines the final grade and outcome for the patient. The patient is then either returned to annual screening, referred to a digital surveillance clinic for more frequent monitoring or referred to hospital eye services.
Referral from screening to digital surveillance clinic
- Possible results:
- R2, M1, R3S
- Follow-up:
- Screened in surveillance clinic every three, six or 12 months depending on progression of disease.
Referral from screening to hospital eye services
- Possible results:
- R3A, R2, M1
- Follow-up:
- Referred to hospital for diagnosis, possible follow-up tests and treatment. Returned to screening or surveillance after discharge.
Reference: