There's no way to judge the quality with the unaided eye.

A few kinds of cells, however, are large enough to be seen with the unaided eye.

It is, thus, not visible from Earth with the unaided eye.

Stick to restaurants you can see with the unaided eye.

The symptoms are usually quite acute and can be seen with the unaided eye.

I certainly can't see anything with the unaided eye.

It has an apparent magnitude of 12.12, and thus cannot be seen with the unaided eye.

It can be seen with the unaided eye as a third-magnitude star.

However, there is a lot of infrared radiation, we just cannot see it with the unaided eye.

The apparent magnitude of this star is 12.51, so it cannot be seen with the unaided eye.

The sky was so clear by then that the shuttle could be followed in flight with the unaided eye for at least five minutes.

Some amateur astronomers have already seen the comet with the unaided eye.

They could be seen with the unaided eye as barely separated points of light, like twin stars, about 200 miles above the earth.

Because of its great size, Clavius can be detected with the unaided eye.

Most phytoplankton are too small to be individually seen with the unaided eye.

Trevize said, "You can see the planet with the unaided eye now.

At first scientists used the microscope to view and draw objects not visible with the unaided eye.

Mary Mac looked skyward as if she could detect it with the unaided eye.

Thus, despite its proximity at 19.8 parsecs (64.6 light years) away from the Earth, it cannot be seen with the unaided eye.

The star is not visible with the unaided eye, but is easy target for binoculars.

The crater is a man-made object that can be seen from earth orbit with the unaided eye.

With a visual magnitude of 7.5, this star can not be observed with the unaided eye.

It can reportedly be detected with the unaided eye, although a telescope is recommended for best viewing.

Today, with the unaided eye, I cannot make out my wife's face farther than a handspan from my own.

It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.