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 Mirtazapine, prescribed for depression can lead to optic nerve damage and/or glaucoma.  Prozac may cause dilated pupils, double vision, blurred vision, and dry eyes. It can also cause eye pain, eye lid infection (blepharitis), cataracts, glaucoma, ptosis (eyelid droop), and an inflammation of the iris (iritis).
These types of symptoms may precede vision loss due to optic neuritis. Optic neuropathy more generally describes optic nerve abnormalities or damage, including from causes such as blocked blood flow or toxic exposure. What Causes Optic Neuritis? Optic neuritis usually occurs in adults younger than 45 and affects more women than men.