Check out the updated version of the Army PFT. The Army's Basic Training Physical Fitness Test is a three-event physical performance test used to assess endurance. It is used to measure a your physical strengths, abilities, and cardio-respiratory fitness.
1 doctor agreed: See ophthalmologiist: Light flashes in the periphery of your vision are usually caused by either a problem in your eye called vitreous detachment or ocular migraine. You need to see an ophthalmologist soon for a dilated eye exam to be sure your retina is OK.
To flicker is to flash on and off at random. If your computer screen is flickering right now, you are probably having trouble reading this. Something that is flickering is flashing on and off in an unpredictable way. A fluorescent light may flicker for a while before it stops working. A flicker is also a quick flash or burst of light, like a glint or a spark. Similarly, flicker can refer to a sudden and short-lived feeling. A child opening a present might have a flicker of excitement before realizing that the box contains only tube socks and underwear.