Using 15 mg/kg/day (1000 mg/day for a 70 kg person) as an arbitrary reference demonstrates that higher doses of intravenous steroids do not appear to be more effective in stabilising and restoring vision.(p value=0.66 by χ2analysis)
| Steroid dose (mg/kg) | VA improved (n=16) | VA same (n=19) | VA worse (n=8) |
| Greater than 15 (n=16) | 6 | 6 | 4 |
| 15 or less than 15 (n=27) | 10 | 13 | 4 |