Macular Degeneration. When the retina becomes damaged it can lead to the development of macular degeneration, also called age-related macular degeneration. When macular degeneration has developed it can cause you to be unable to see objects in the same sharp, detailed way that you used to be able to see them.
No single set of symptoms or laboratory test, such as a blood test, imaging test, genetic test, or immune function test, can independently identify MS. A doctor must use multiple tools to diagnose MS. The most important tools are the medical history, a careful and thorough neurologic exam, and magnetic resonance imaging (MRI). Other tests include visual evoked potentials (VEP) and analysis of spinal fluid taken by lumbar puncture.
Diagnosing Stroke: What Blood Tests May Reveal. Doctors will take a blood sample and run the following tests when trying to diagnose stroke: CBC, or complete blood count, measures the number of platelets and red and white cells in your blood. CBC results can suggest certain conditions that may or may not be associated with a stroke, such as anemia or an infection.