She put her head down, but not before he noticed her eyes going opaque.

But it will respond to certain kinds of shock by going opaque.

Monica's eyes went opaque the way they did when she was confused.

He watched her eyes cloud, then the rich brown of them go opaque as she came.

Her eyes blazed for an instant and then went opaque.

Her eyes went opaque, and for a moment he thought she hadn't heard or wouldn't respond.

His dark eyes went opaque, as if a door had closed.

In a moment her brown eyes went opaque, the pupils expanding.

Then he stared back at the coffin, which had gone opaque.

For a moment his own fierce eyes seemed to go opaque.