I think people might have misunderstood what I meant. I didn't mean there's an actual projector and screens like in a movie theater. Let me elaborate:

Imagine you're standing in a room with a light behind you on a ceiling. You're facing a wall. The light is coming from behind you and bouncing off the wall. What you're seeing is a projection of the wall into your eyes. You wouldn't say that you're looking at the light directly behind you.

Imagine the overhead projector (if you're at least as old as I am). It doesn't have any electronics. It's just a strong light, a lens and a mirror. And it projects the writing on the wall. You're looking at a projection on the wall in the classroom. You wouldn't say you're looking directly at the ink on the transparent piece of plastic used in those projectors.

What if the window you're looking through was actually a prism that refracts light at a right angle and you'd be seeing stuff that's actually on the far left side of the house? Would you say you're looking directly through the window like you would if it was an ordinary window?

You can see this effect on the glasses if you place them on the table and look at them. You won't see the table cloth underneath the lenses straight through them. They refract the light and you will see an image on them of whataver object they're pointed at.

That's what I meant by projection.

Also, in the right conditions you can see through water and a reflection of something on it's surface at the same time.