So my mother just visited my grandmother last week and when she came back, she said my grandmother had told her she sees people when her eyes are closed. When this happens, my grandmother is not necessarily going to sleep; she sees only one person at a time; none of the people are individuals she recognizes; and everyone she sees is in black and white (keeping in mind, she is not colorblind).
Additional details: My grandmother is 75, has seen this as long as she can remember, and has a history of being superstitious.