<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 Vitelliform DystrophyRetinitis PigmentosaCone- Rod Dystrophy  <response>: Normal ERG with an abnormal EOG is charachteristic of bests vittelliform dystrophy. 