I know you're reading this because of your SACCADE

What's "the word I'm thinking of"? Today it's....

SACCADE (noun) [sa-KAHD] A small, rapid movement of the eye

"Watching Henry as he turned the pages of Gravity's Rainbow, I was fascinated by the saccades of his left eye, which seemed to oscillate faster than his right." (TWITO, page 129)