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.
Fireflies in the western United States, for example, lack the ability to produce light. (2) Males that do glow use their flash to attract females. Each species has its own pattern of light flashing. (3) In some places at some times, fireflies synchronize their flashing. (4) Firefly light can be yellow, green or orange. (5) Firefly larvae may glow, even some that live underground or under water.