Research on Association of the Diameter of the Internal Carotid Artery Siphon and Nonarteritic Anterior Ischaemic Optic Neuropathy

Table 1

The diameter of the ICA siphon and the OA.

	OA diameter (cm)	ICAS diameter (cm)
Observation group	0.16 ± 0.02	0.30 ± 0.07
Control group	0.15 ± 0.02	0.32 ± 0.06
t value	0.128	−2.596
P value	0.899	0.015

OA: ophthalmic artery; ICAS: internal carotid artery siphon. values were calculated using the paired t-test.