It happens to me a lot when i'm meditating, in transe or before sleep. I think it comes from a slight dephasing between etheric or astral and physical body. What i find funny is that i never notice it at first, i would start to see through my eyelids very naturally, and after a few minutes i would suddenly realize what i'm doing
But i only see in grey and black most of the time, scarcely in perfect colors (well in fact i just did it this morning lol but it's not usual for me).
