A young patient presents to the ophthalmology clinic with loss of central vision. ERG is normal but EOG is abnormal. Which of the following is the most likely diagnosis?: (A) Stargardt's disease, (B) Best's Vtielliform Dystrophy, (C) Retinitis Pigmentosa, (D) Cone-Rod Dystrophy
Answer is B. It is arare, autosomal dominant, gene on chromosome 11 (11q13). It occurs between 5 -15 years of age. Sharply reduced or absent light response in EOG and normal ERG confirms diagnosis. Ref: Ophthalmology: A Pocket Textbook Atlas - Page 356.