A 57-year-old man with no previous medical history entered the emergency de
partment with 2 days of painless vision loss in the left eye. The patient w
as diagnosed with central retinal vein occlusion (CRVO) and admitted for tr
eatment. Further work-up revealed that the cause of his CRVO was a hypervis
cosity syndrome secondary to multiple myeloma. The patient received two rou
nds of plasmapheresis with slight recovery of vision and was discharged 28
days later. (C) 2000 Elsevier Science Inc.