Since my childhood, I see red and green dots when I close my eyes or during dark. They are everywhere moving very fast and always twinkling. What are they and why do we see them?
In: Biology
Unless you’re fully blind, your vision isn’t really ever “fully off.” Those little flashes are signals from your eyes and/or your brain trying to make sense of things. Since our eyes aren’t ever fully off they still send a few signals to the brain. These are interpreted by our minds as the red and green flashes.
They are red and green because our eyes have three types of cell called a cone cell, which detects color. Two of these detect light in the red and green parts of the spectrum. The third is in the blue and purple part. You might also be seeing blue and purple, but just haven’t noticed since everything is pretty dark when you close your eyes.
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