Books
There is something profoundly disturbing about watching an eye that is watching you, particularly when the eye that is watching you is almost the same size as your eye, and the thing that it is watching you out of is a lizard.
— Douglas Adams · Last Chance To See

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Adams finds being stared at unsettling, especially when the eye is nearly the size of his own. Then he adds the punchline detail that it belongs to a lizard. The mounting specifics turn creeping unease into comedy.
Context reviewed