I am a jogger - I jog at least 4 days a week and have been for many years. I don't run fast ever, it's definitely a jog so i'm not pushing myself too hard. Sometimes I have this problem and i'm wondering if I should seek a doctor. The problem is sometimes when I jog - it could be a bright, hot, and sunny day or a cool evening - and within the first 2 miles I will begin to have visual problems. It starts out as a flickering orange light on my right side of my field of vision. If I continue to jog turns into two BRIGHT objects that are outlined in neon purple and are lime green on the inside and they eventually take over my whole field of vision so that I can't see well enough to finish. I asked a friend and they said it could possible be my blood pressure, but i've never seen a doctor about this. Any ideas as to what it could be or what I should do?