"I Fall To Pieces" Question

[Agent Z]

When I first watched this episode I at first thought the idea was that the villain was stalking the woman by being able to see through her eyes because of something he did to her while giving her an eye operation. Then the episode revealed that it was because he had his eye in her apartment.

Okay.

How did she not notice this?

Seriously, a floating human eyeball is not something a person with functioning eyesight will miss. It's too obvious and jarring to not notice. I can see her missing this once or twice but sooner or later she'd have to see it. And this has been going on for seven months! How did his eye hovering around in her apartment escape her attention?

 

[nightshade]

I don't think it was like that in the beginning, it probably was more of a normal stalking, then he built up to that. The eye most likely looked at her through windows, keyholes etc first, so she didn't see it.