He shut his eyes, the better to concentrate.

Her face had drained of color, concentrated now in those huge gold eyes.

It was as if his eyes concentrated deliberately on trying to throw the steady hand off its course on the paper.

The gray eyes narrowed, as Zar concentrated on the actions he could not see.

Closed his eyes to concentrate on the sound.

Her steel-blue eyes shut out the rest of class and concentrated only on her words.

Otto's eyes momentarily concentrated on Lloyd's face as if he could have quite happily set fire to his forehead.

There was a long silence during which Miri kept her eyes closed and concentrated on breathing.

His eyes concentrated on her like coherent light.

Now he closed his eyes, the better to concentrate on bringing them all completely into rapport with himself and each other.