There are 57 conditions associated with blurred vision, dizziness, floating spots or strings in vision and lightheadedness. The links below will provide you with more detailed information on these medical conditions from the WebMD Symptom Checker and help provide a better understanding of causes and treatment of these related conditions.
Bone marrow aspiration. The bone marrow aspiration is usually done first. The doctor makes a small incision, then inserts a hollow needle through the bone and into the bone marrow.Using a syringe attached to the needle, the doctor withdraws a sample of the liquid portion of the bone marrow. You may feel a brief sharp pain or stinging.one marrow aspiration. The bone marrow aspiration is usually done first. The doctor makes a small incision, then inserts a hollow needle through the bone and into the bone marrow.
Bone marrow tests also help doctors figure out how severe a cancer is and how much it has spread in the body. The tests also are used to diagnose fevers and infections. The two bone marrow tests are aspiration (as-pi-RA-shun) and biopsy. Bone marrow aspiration usually is done first. For this test, your doctor removes a small amount of fluid bone marrow through a needle. He or she may have some idea of what the problem is, and the sample gives him or her useful information about the cells in the marrow. A bone marrow biopsy is a followup test. It's done when an aspiration doesn't give needed information. Or, it's done if your doctor wants to examine the bone marrow structure itself.