I have floaters and i am 26. My doctors havr diagnosed me with PVD in March this year with nothing else after dilated exam. They have asked me to come back if I see flashes of light or lightening in vision too frequently. Although I only experienced something similar once or may be twice, but I am not sure. However, i was looking at the ceiling and was lost in thought when i saw a small white dot appear and float upward. Very very tiny white dot, it floated upward and then disappeared. Can it be considered flashing ??? Should i be concerned