how is the vision ? are you seeing any new floaters? what kind of trauma did you suffer ?
You are having what we call photopsias. The back of the eyeball is full of a gel called vitreous. This gel is intimately attached to the retina and trauma can cause it to pull away from the retina. The separation of the gel from the retina causes flashes of light to be seen, often off to the side in an arc pattern. If there is a weak spot in your retina, the gel may cause a tear to be formed. You should get your eyes examined in the next week or two to make sure there is no retinal tear. You need to be seen much sooner if you get new floaters, or a significant increase in the frequency of flashes as this may indicate a retinal tear. Hope this helps.