Fig. 5From: Altered birefringence of peripapillary retinal nerve fiber layer in multiple sclerosis measured by polarization sensitive optical coherence tomographyPeripapillary retinal nerve fiber layer (pRNFL) thickness and birefringence in MS patients. The MS patients with normal pRNFL thickness range formed a subject group using PS-OCT measured 78 μm as a cut off of pRNFL. These MS patients did not show a difference of pRNFL thickness compared to their paired controls (a, P > 0.05). In contrast, the PR/UD showed significant decreases in the inferior quadrant and the entire circle compared to their paired controls, respectively (b, P < 0.05)Back to article page