Eye–hand span

The eye–hand span (or 'perceptual span') is the distance between the eyes and the hands on a text — usually linguistic text that is being copy-typed or music notation that is being performed.

The eye–hand span is typically measured from the location of central visual input, and stretches between the syllable or chord currently being typed or performed, and the lateral location of the simultaneous fixation. The eye–hand span is analogous to the eye–voice span in reading language aloud and in singing.