Entry: nystagmic (adj.)
In context: "Troeltsch, left eye ominously nystagmic, pretended to recap the day's match highlights for a subscription audience, speaking earnestly into his fist."
Definition: Of the nature of or characteristic of nystagmus; of or relating to nystagmus. Also in extended use.
That's not so helpful, is it? Here's nystagmus (n.)
Involuntary, rapid, oscillating movement of the eyeballs (most commonly from side to side); an instance or type of this.
Other: It's Monday and you're probably dying to take a look at nystagmus up close and personal, right? The movement is less exaggerated than I had thought - here's a short video clip. Since this is the Internets, of course there's also a video of a cat with nystagmus.
SNOOT score: 1
Source: Oxford English Dictionary, YouTube