Bilateral inferotemporal dialysis in identical twins.

Retinal detachment associated with inferotemporal dialysis comprises approximately 10% of all retinal detachments. We describe the cases of two patients with bilateral inferotemporal dialyses who were identical twins. This finding suggests that genetic factors play a role in some cases of inferotemporal dialysis. One of the twins was asymptomatic, stressing the importance of examining other family members of patients with nontraumatic retinal dialysis. We believe that the cause of inferotemporal dialysis is multifactorial and there is a definite subpopulation in which a genetic predisposition is present.