L lostinne New member Apr 14, 2010 #1 Sometimes when I am tired and use my phone (usually the internal screen), I see a circular halo in the center of my field of vision for about 30 minutes. I don't get a headache, just see this annoying shape. What might be the cause of this?
Sometimes when I am tired and use my phone (usually the internal screen), I see a circular halo in the center of my field of vision for about 30 minutes. I don't get a headache, just see this annoying shape. What might be the cause of this?
