In the case of leukemia, the cancer interferes with the body's ability to make blood. Leukemia attacks the bone marrow and the blood itself, causing fatigue, anemia, weakness, and bone pain. It is diagnosed with a blood test in which specific types of blood cells are counted.amples of blood from a healthy person and from one with leukemia, a type of blood cancer. Leukemia is often diagnosed after blood testing. Hematologists analyze blood cancer samples. Swollen lymph nodes are one symptom of lymphoma. Red blood cells.
1 Birth control pills can contribute to dry eye syndrome. 2  Oral contraceptives can lead to many eye problems by increasing pressure of the fluid around the brain causing headache, vision changes, and swollen optic nerve.  Birth control pills can lead to many eye problems, including retinal vascular problems.
In the case of optic neuritis, the optic nerve becomes swollen, and its function is impaired. Inflammation of the optic nerve causes loss of vision because of the swelling and destruction of the protective myelin sheath that covers and insulates the optic nerve.