I'm not sure that matters much, it'd likely still be concentrated on a smaller radius than the pupil, even if it isn't focused to an absolute pinpoint.
Not really, if you look at an accurate model of the human eye about half the inner sphere is photoreceptive. Where a much smaller area collects light. It’s a very different model than how cameras work and how most simplified models are shown.
This is why you can’t keep objects on the foreground and background focused at the same time.