Background
Best disease, also termed vitelliform macular dystrophy, is typically an autosomal dominant disorder, which classically presents in childhood with the striking appearance of a yellow or orange yolklike lesion in the macula. Dr Franz Best, a German ophthalmologist, described the first pedigree in 1905.
The lesion evolves through several stages over many years, with increasing potential for adverse visual outcome. A hallmark of the disease is a markedly abnormal electro-oculogram (EOG) in all stages of progression and in phenotypically normal carriers.
The adult form varies, as described and shown in the image below.
Adult vitelliform macular dystrophy resembles Best disease, but it can be differentiated by its later age of onset, smaller lesion, and normal electro-oculogram testing.