PURPOSE/METHODS: We examined a 23-year-old woman who had a sudden onse
t of floaters after self-induced emesis. RESULTS/CONCLUSIONS: Examinat
ion showed a dense vitreous hemorrhage originating from a rupture site
in the wall of the superotemporal branch vein. We postulate a preexis
ting weakness in the retinal vein wall as a predisposing factor to rup
ture. This mechanism may explain some cases of vitreous hemorrhage ass
ociated with a Valsalva maneuver.