Table 1: Visual field indices of study patients according to disease stage

		Suspects (n = 22)		Mild (MD < 6 dB; n = 54)		Moderate (-6 dB < MD < 12 dB; n = 16)		Advanced (12 dB < MD < -20 dB; n = 16)		End stage (MD > 20 dB; n = 14)
Age (years)		50.5 ± 10.0		57.5 ± 12.4		67.9 ± 9.4		65.7 ± 15.6		60.2 ± 17.0
MD (dB)		–0.9 ± 1.1		–3.1 ± 1.7		–7.7 ± 1.7		–15.6 ± 2.2		–28.0 ± 3.9
PSD (dB)		1.4 ± 0.4		3.5 ± 2.1		5.5 ± 2.3		11.6 ± 2.0		6.2 ± 3.9
VFI (%)		99.3 ± 0.9		94.0 ± 4.4		84.1 ± 7.7		56.9 ± 6.8		13.4 ± 12.9

MD: Mean deviation; PSD: Pattern standard deviation; VFI: Visual field index