Your doctor will look for signs of neurological problems. These include:
Decrease in the sharpness (acuity) of your vision
Your eyes not working in a coordinated way
Difficulty coordinating body movements
Muscle weakness on one side or in one part of your body
Loss of sensation
To confirm the diagnosis, your doctor probably will order a magnetic resonance imaging (MRI) scan. The MRI will check for inflammation and myelin sheath destruction in your brain and spinal cord.
Other possible diagnostic tests include:
A detailed eye examination by an ophthalmologist.
Special tests called evoked potentials. These tests record electrical activity in the brain.
Lumbar puncture (spinal tap) to obtain spinal fluid. Spinal fluid may show abnormal types of proteins called immunoglobulins. This is a characteristic finding in MS.