A suggested management protocol for patients with CRVO
| Less than 3 months from onset: | |
|---|---|
| If neovascularisation treat with panretinal photocoagulation | |
| If no neovascularisation and: | |
| ERG | Reduced flash photopic wave amplitude |
| RAPD | 20 degrees or more (cross polarised filters, if other eye normal) |
| Visual acuity | Less than 6/60 (if no cystoid macular oedema) |
| Doppler ultrasound | Vmin less than 3 cm/s (repeated examinations) |
| Manage with frequent observation (every 2 weeks) or prophylactic panretinal photocoagulation and monthly observation | |
| After 3 months from onset: | |
| If neovascularisation treat with panretinal photocoagulation | |
| If no neovascularisation and: | |
| ERG | Reduced flash photopic wave amplitude |
| RAPD | 20 degrees or more (cross polarised filters, if other eye normal) |
| Visual acuity | Less than 6/60 (if no cystoid macular oedema) |
| Fluorescein angiography | Capillary dropout 10 disc diameters or more |
| Manage with frequent observation (monthly up to 6 months then 2 monthly) or panretinal photocoagulation | |