Stefek B, et al. J Pediatr 2015; 167: 1152-4. This study reports on an 8-year-old with Henoch-Schonlein purpura (HSP) who developed posterior reversible encephalopathy syndrome (PRES). The authors state that neurologic manifestations develop in 2-8% of patients with HSP; of these patients, 20% suffer long-term effects.
Also, in commentary to my post on Thursday, one blog follower pointed out that the Fred Hollows Foundation is another charitable organization dedicated to restoring eyesight and has been doing this for a long time.