Space: 0.4 mm minimum haptic detection.
Time: 5 ms minimum temporal gap detection for haptic.
Space and Time. Fingertip.
There’s something here about the granularity and how it compares to visual acuity as they share the same systems (where / what pathways.
OK! I think I have to compare with micro-saccading as it’s not fair to compare the vision’s combined mental picture capability when one isn’t comparing it to the tactile produced image in the blind person’s mind!
“Saccades to an unexpected stimulus normally take about 200 milliseconds (ms) to initiate, and then last from about 20–200 ms, depending on their amplitude (20–30 ms is typical in language reading). “
Oh saccading is slow, although language reading may do.