Nighttime “visitations” may be chalked up to sleep deprivation, to hypnagogic or hypnopompic hallucinations.
The first is hypnagogic hallucination, the second coloured audition.
On the contrary, hypnagogic illusion is, with me, a decided phenomenon.
In these respects, and in the awakeness of the scryer, crystal pictures differ from hypnagogic illusions.
And there are crystal-seers who are not subject to hypnagogic illusions.
The experience of hypnagogic illusions also seems far more rare than ordinary dreaming in sleep.
These ‘hypnagogic illusions’ Pontus de Tyard described in a pretty sonnet, more than three hundred years ago.
For bad visualisers, on the other hand, the vividness of these hypnagogic pictures may be absolutely a revelation.
hypnagogic hyp·na·gog·ic or hyp·no·gog·ic (hĭp'nə-gŏj'ĭk, -gō'jĭk)
Inducing sleep; soporific.
Of or relating to the state of drowsiness preceding sleep.
Relating to the images or hallucinations sometimes perceived during this state.