ADJ [ADJ n, ADJ after verb, verb-link ADJ]视而不见的;不留心的 If you describe a person or their eyes as unseeing, you mean that they are not looking at anything, or not noticing something, although their eyes are open. 视而不见的;不留心的 [literary]
In the hallway Greenfield was staring at the wood panelling with unseeing eyes.