Why would the fact that she was a woman and white always obtrude itself upon his consciousness?

Yet something from that past had of late intruded upon his consciousness.

Fear burst full blown like a bomb blast upon his consciousness.

The fact impressed itself upon his consciousness but did not worry him; he was in too much pain for that.

Something had been forcing itself upon his consciousness for some time, and suddenly he realized what it was.

As the day died, the first fact to impress itself upon his returning consciousness was that of Sally's presence in the room again.

A terrible hold upon his consciousness was about to break and let go.

One of them registered like a blow upon her consciousness.

Now and then a thought threatened to intrude upon his consciousness or perhaps feeling was the more appropriate word.

Roger had been trying to take comfort in that fact himself, but there were too many other possibilities forcing themselves upon his consciousness.