They are described as having a 'haunted look' about them.

The fever is gone, but he has a haunted look in his eyes.

His eyes took on an even more haunted look.

She flashed a smile, though her eyes still held a dark and haunted look.

There was a troubled, haunted look in her wide eyes.

But it wasn't the same haunted look that had possessed her before.

He drew the curtain across and turned back to her with the same haunted look in his eyes that she had seen before.

A haunted look flitted like a shadow behind her eyes.

She wore the same haunted look this morning in practice.

She'd always wanted to capture that quiet, haunted look in Emma's eyes.