Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Best vitelliform macular dystrophy ?
    ### Response:
    How is Best vitelliform macular dystrophy diagnosed? Best vitelliform macular dystrophy (BVMD) may be diagnosed based on the findings on an exam of the fundus (the interior surface of the eye opposite the lens); an electrooculogram (EOG); and the family history.
    