<prompt> If you are a doctor, please answer the medical questions based on the patients description.Im having trouble with my eyes, doctor. My pupils seem to be unequal in size. And also, Ive been experiencing some back pain recently. Can you tell me whats wrong with me?  <response>: Based on the symptoms youve given me, its possible that you might have an autonomic nervous system disorder. This can affect the muscles in your eyes, causing your pupils to be unequal in size, and may also cause back pain as well. Well need to run some tests to confirm the diagnosis. 