<prompt> 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?Stargardts diseaseBests Vtielliform DystrophyRetinitis PigmentosaCone-Rod Dystrophy  <response>: 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. 