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. 2  To find aneurysms or tears in the aorta, which carries blood from the heart to the rest of the body.  To find blood clots in arteries and veins.