A few days ago I started to experience a vision of fleeting light (very fast, from left to right or from up to down) in my right eye. I do not have any medical problem, I run four days a week 3 miles. I am 55 years old. That light is like a little tiny point of light that runs very fast before my right eye. I do not have any other symptom related with this, no headache, not anything. I use glasses, progressives lenses.