BFEP lights are all the same size and shape. And their speed varies in time with your pulse, accelerating with your heartbeat.ĭon’t confuse the normal blue field entoptic phenomenon (BFEP) with floaters or flashes-which can interfere with your vision and signal a serious eye problem. Their movement may seem squiggly, following the path of the capillaries in your eyes. These “blue-sky sprites” normally disappear after a second or less. You may also see a dark tail with the dot of light, which is a bunch-up of red blood cells behind the slower-moving white blood cell. The dots may look like little worms as the bigger white blood cells stretch and elongate to pass through the capillaries. The retina sends a signal of increased brightness to the brain, and, to a viewer looking at the sky or any large monochromatic area, it looks like a tiny spot of white light is moving through the space. These larger blood cells let blue light through to your retina. White blood cells flow through the capillaries much less frequently than red blood cells. As these cells move through the capillaries in front of your retina, your eye and brain adjust so that you don’t see shadows or dark spots. Red blood cells, which make up more than 90 percent of your blood, absorb blue light. What you are experiencing is a very normal occurrence called the blue field entoptic phenomenon.īlood flows to your eyes through capillaries that pass over the retina - the tissue at the back of your eye that acts as a receptor for all light. They are created by your own white blood cells flowing through your eyes. Look up at a bright, blue sky and you may notice tiny dots of moving light. Posted by: Pepose Vision Institute in Interesting Info on January 4, 2016 What Are the Moving Dots I See When I Look at a Clear Blue Sky?
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