Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) oculopharyngeal muscular dystrophy ?
    ### Response:
    Oculopharyngeal muscular dystrophy is a genetic condition characterized by muscle weakness that begins in adulthood, typically after age 40. The first symptom in people with this disorder is usually droopy eyelids (ptosis), followed by difficulty swallowing (dysphagia).
    