<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have an irregular belly button and sharp abdominal pain, and suddenly I am having trouble seeing. What could be the issue?  <response>: Based on your symptoms, you may have an open wound of the abdomen, which could be causing the irregular belly button and sharp abdominal pain. However, blindness is not a usual symptom of an open wound. I recommend you see an eye doctor immediately for further evaluation of your vision loss. 