Blurry vision, ghost images and nighttime halos around lights all can be warning signs of eye problems. 1  A flood of spots and floaters in your field of vision. 2  A sensation that a dark curtain has settled across your field of view. 3  Sudden eye pain, redness, nausea and vomiting.  Double vision, double images or ghost images.
MR Angiography (MRA) MR angiography (MRA) uses a powerful magnetic field, radio waves and a computer to evaluate blood vessels and help identify abnormalities or diagnose atherosclerotic (plaque) disease.
MRA scans are typically used for the following reasons: 1  To find bulges (aneurysms), clots, or buildups of fat and calcium deposits in the blood vessels leading to the brain.  To find aneurysms or tears in the aorta, which carries blood from the heart to the rest of the body.