strabismus (n.)
"a squinting," 1680s, medical Latin, from Greek strabismos, from strabizein "to squint," from strabos "squinting, squint-eyed," related to strobos "a whirling round," from PIE *streb(h)- "to wind, turn" (see strophe). Earlier in anglicized form strabism (1650s). Related: Strabismal; strabismic; strabismical.