Table 1: SD-tVEP abnormality by staged group*

		n		MD†		LCA		LCL		HCA		HCL
Mild		71		–1.19 ± 2.49		6 (8.5%)		10 (14.1%)		4 (5.6%)		16 (22.5%)
Moderate		20		–9.12 ± 1.53		1 (5.0%)		5 (25.0%)		0 (0.0%)		8 (40.0%)
Severe		42		–19.77 ± 4.58		3 (7.1%)		12 (28.6%)		10 (23.8%)		22 (52.4%)

*Expressed as number of eyes with specified abnormality (%); ^†mean ± standard deviation; Mild: visual field mean deviation of < -6 dB, Moderate: visual field mean deviation between -6 and -11.99 dB, Severe: visual field mean deviation of ≥ -12 dB; MD: Mean deviation; LCA: Low-contrast amplitude; LCL: Low-contrast latency, HCA: High-contrast amplitude; HCL: High-contrast latency