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 Antidepressants, which change how information is processed in the nerves in the brain. Any medication that affects neurological function can affect vision and cause changes in the cornea, optic nerve, lens, macula and retina.  Venlafaxine, prescribed for depression can lead to optic nerve damage and/or glaucoma.
Papilledema is swelling of the optic disk due to increased intracranial pressure. Optic disk swelling resulting from causes that do not involve increased intracranial pressure (eg, malignant hypertension, thrombosis of the central retinal vein) is not considered papilledema. There are no early symptoms, although vision may be disturbed for a few seconds.