Fig 1. Comparisons of eyes ipsilateral to unilateral radical neck dissection (uRND) with fellow eyes in terms of changes in intraocular pressure (IOP) between pre-operative baseline (prior to uRND) and post-operative follow-up visits (1, 3, and 6 months after uRND).

POAG = primary open-angle glaucoma, GS = glaucoma suspect. ^* P = 0.015, ^** P = 0.007, ^*** P = 0.004 (when comparing post-operative IOP to pre-operative baseline).