Table 8: Comparison of intraocular pressure, visual field, and optic disc parameters between the two OSA groups (either with or without normal tension glaucoma [NTG]) and the control group.

Parameter	OSA subjects with NTG (n=24)	OSA subjects without NTG (n=56)	Controls (n= 20)	P values
Mean IOP (mm Hg)	16.14 ± 1.32	15.66  ± 1.02	15.45 ± 1.41	.082
C/D ratio	0.671± .21	0.231 ± .44	0.243±.213	0.001*
MD (Decibels)	-6.12 ± 2.01	-1.20 ±.82	-1.12±.66	0.003*
PSD (Decibels)	6.51±1.44	1.42±.77	1.35±.58	0.001*
Parapapillary RNFL thickness (total)	69.34±11.33	112±9.92	115±12.52	0.001*
SE	-1.11±1.7	-1.01±.78	.98±.35	.103