Beneath dark brows, his gray eyes observed her with frank interest.

The physician thought that eyes were no longer observing him.

Yet his fixed eyes must have observed the invaders, for he spoke.

The other eye, looking through the glass, observed the color as yellow!

There is also another argument which may bring up the reason that of pigment and how our eyes actually observe color in the first place.

Out of the scarred face, brown eyes observed her with more insight than she liked.

Two shining eyes and a smile were observing them from the dark recess.

But there was something which even the keen eyes of Lopez did not observe.

The great dark eyes observed with intelligence the man's reaction to the transformation.

The Shadow's keen eyes had observed accurately the result of his last shot.