Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Diabetic Retinopathy ?
    ### Response:
    Diabetic retinopathy often has no early warning signs. Don't wait for symptoms. Be sure to have a comprehensive dilated eye exam at least once a year to detect the disease before it causes damage to your vision. Vision Changes May Indicate Bleeding In the early stages of diabetic retinopathy, you may not notice any changes in your vision.
    