visual field
field of vision
field of regard

Michael saw something come into his field of vision, and it was white.

He heard her close the door, and men she moved into his field of vision again.

He moved across my field of vision, that was all.

He saw Anne look away from him and leave his field of vision.

The field of vision is much more complex than that.

And at each appearance, they seemed to remain in his field of vision for a little longer.

Then people began to enter his field of vision, led by a doctor.

Then he was gone from my field of vision, down behind the sports car.

My first question is: are they also in our field of vision?

I moved into her field of vision; at first she didn't focus.