THE INCIDENCE of spontaneous vitreous hemorrhage is approximately 7
per 100 000. Dynamic vitreoretinal traction (DVRT) is the leading cause
and accounts for more than one third of cases (DRVT with retinal tear—30%;
DRVT without retinal tear—8%).1 In
this setting, the presence of blood in the vitreous cavity typically results
from DRVT on a retinal vessel during vitreous separation. It is believed that
the posterior hyaloid is more strongly adherent over the major retinal vessels,
and traction with subsequent gel separation may lead to disruption of the
vessel wall.