Bilateral choroidal osteoma with optic atrophy.

Choroidal osteoma is a rare, yellowish-white lesion of the choroid that predominantly affects young women in the second decade of life. Subretinal neovascularization or collection of subretinal fluid may occur in 50 % or more patients in the long run. A 15-year-old girl presented to our practice with bilateral choroidal osteoma associated with advanced bilateral optic atrophy. The underlying cause for optic atrophy is unclear; possible explanations include mechanical pressure effect and ischemic damage.