BILATERAL CONGENITAL OPTIC-NERVE HEAD PITS IN MONOZYGOTIC SIBLINGS

PURPOSE: To report bilateral congenital optic nerve head pits in monoz ygotic siblings. METHOD: Case reports. RESULTS: Pits were found in abn ormally large optic disks in both eyes of two otherwise healthy female monozygotic siblings aged 15 years, Pit size increased and visual acu ity decreased with increased optic disk area, In one eye, nonrhegmatog enous retinal detachment developed that eventually necessitated pars p lana vitrectomy, The siblings' parents were unremarkable. CONCLUSIONS: Congenital optic nerve head pits can occur bilaterally in otherwise h ealthy monozygotic siblings with ophthalmologically unremarkable paren ts, Associated nonrhegmatogenous retinal detachment may be treated by pars plana vitrectomy. Pit size is positively correlated with disk are a.