Phosphenes are a phenomenon characterised by the experience of seeing light without light actually entering the eye. They are often associated with optic neuritis and may be enhanced by movement or sound.
Phosphenes can be directly induced by mechanical, electrical or magnetic stimulation of the retina or visual cortex as well as by random firing of cells in the visual system. Phosphenes have also been reported by meditators; people who go for long periods without visual stimulation (also known as the prisoner’s cinema); or those who are using psychedelic drugs.
The most common phosphenes are pressure phosphenes, caused by rubbing the closed eyes. Pressure on the eye results in activation of retinal ganglion cells in a similar way to activation by light.
Another common phosphene is ‘seeing stars’ from a sneeze, blowing of the nose, a blow on the head or low blood pressure.These involve metabolic (such as from low oxygenation or lack of glucose) stimulation of neurons of the visual cortex or of other parts of the visual system. Astronauts exposed to radiation in space also report seeing phosphenes.
( via Ghost_Animator )
being on acid and looking at pics was the reason I started a tumblr
Seriously thou!!! ^^^ that’s why my tumblr is the way that it is. When I trip I love looking at my blog filled with everything i love…but itsdifferent u see, it’s actually ALIVE and not just plain 2D
it’s called the Doctrine of Signatures!
Sample of W.B. Yeats’ original ritual notebooks for the Hermetic Order of the Golden Dawn.
:) Oh, how I adore Tumblr!