Final answer:
The narrator finds Robert's eyes uncomfortable because they have a piercing and intense gaze that makes her feel uneasy.
Step-by-step explanation:
The narrator finds looking at Robert's eyes uncomfortable because they have a piercing and intense gaze that makes her feel uneasy. In the given passage, it is described that Fay's violet eyes seemed to look through the narrator with wisdom. This intense eye contact makes the narrator feel self-conscious and embarrassed.