### Patient: Doctor, I've been experiencing low back weakness, arm pain, elbow weakness, and diminished vision. What could be the reason for it?
### Doctor: Based on your symptoms, it appears that you may have a form of thalassemia. This is a genetic blood disorder that affects the production of hemoglobin, which can lead to anemia and a range of symptoms, including those you are experiencing. We'll need to conduct further tests to confirm the diagnosis.