Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) vitelliform macular dystrophy ?
    ### Response:
    Vitelliform macular dystrophy is a genetic eye disorder that can cause progressive vision loss. This disorder affects the retina, the specialized light-sensitive tissue that lines the back of the eye. Specifically, vitelliform macular dystrophy disrupts cells in a small area near the center of the retina called the macula.
    