<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, Ive been having some trouble with my vision lately, and Im also experiencing apnea and insomnia. What could be causing this?  <response>: Based on your symptoms, its possible that you have Wilsons disease. This is a condition where copper builds up in the body and can cause neurological and psychiatric symptoms, as well as liver disease. Have you been experiencing any other symptoms? 