That was an novel exercise.
Meaning: a phenomenon characterized by the experience of seeing light without light actually entering the eye.
Etymology: Greek words phos (light) and phainein (to show)
Usage in a sentence: “She squeezed her eyes shut, and enjoyed the show of phosphenes.”
Do this exercise right now. Don’t worry, it won’t hamper your blog-hopping abilities.
Shut your eyes. Press your fingers over your eyelids or rub your closed eyes.
Do you see any of the following patterns when you do this exercise?
What you’ve just done is the same thing that the ancient Greeks did and knew about. This colour filled image is called a phosphene. The creation of a phosphene has no magical explanation. It has been studied by Isaac Newton too! Here’s the theory (from Wikipedia):
The pressure mechanically stimulates the cells of the retina. Experiences include a darkening of the visual field that…
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