naked eye

They looked better than what he'd been able to see with the naked eye.

They're able to look at it with their naked eyes.

It may be too small to see with the naked eye.

It was now close enough to make out with the naked eye.

We looked above but with the naked eye there was nothing to be seen.

It was much too fine for him to read with the naked eye.

Here was a new fact about nature that could be seen with the naked eye.

I'm not going to turn a naked eye to it.

It cannot be seen from Earth with the naked eye.

I can't make out the picture very well, but that is with just the naked eye.