Effects of Wrist-rest on ICP (Horie et al.,1993)
With wrists on desks ICP averaged 31.3 mm Hg.
With wrists on wrist rests ICP averaged 31.4 mm Hg.
With wrists floating over keyboard ICP averaged 14.1 mm Hg.
Wrist rests do not decrease ICP.
Any support surface must allow hands to glide over the keys to minimize ICP.