“…Patients who ended with legal blindness at final follow-up had a mean surgical delay of 6.5 days, whereas patients with a better visual outcome only had a median delay of 2 days. 8 The mechanism of permanent vision loss in FIH may be superimposed NAION. 1 , 2 Table 3 compares characteristics of both NAION with papilledema and fulminant IIH.…”