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The blue field entoptic phenomenon or Scheerer's phenomenon is the appearance of tiny bright dots moving quickly along squiggly lines in the visual field, especially when looking into blue light (such as the sky). This is a normal effect that can be perceived by almost everybody. The dots are due to the white blood cells that move in the capillaries in front of the retina of the eye, near the macula.
Originally posted by Awarenessiskey
Floaters are living organisms that lives on your eye, They may appear to look like little blood cells or a simple long lookin organism.