Table 3: Contrast sensitivity results in controls, mild glaucoma and advanced glaucoma cases.

CS		Normal	Mild	Advanced
1.5 c/d		5.5 ± 0.13	4.90 ± 0.3	4.32 ± 0.22
	p1				0.0.001^*
	p2				0.002^*
	p3				0.01^*
3 c/d		5.99 ± 0.11	5.25 ± 0.58	4.44 ± 0.29
	p1				0.001^*
	p2				0.001^*
	p3				0.003^*
6 c/d		4.383 ± 0.12	3.52 ± 0.03	2.96 ± 0.31
	p1				0.001^*
	p2				< 0.001^*
	p3				0.08
12 c/d		3.9 ± 0.08	2.45 ± 0.26	1.88 ± 0.51
	p1				0.001^*
	p2				< 0.001^*
	p3				0.13
18 c/d		2.75 ± 0.75	1.61 ± 0.33	1.24 ± 0.48
	p1				0.008^*
	p2				0.002^*
	p3				0.33

Data expressed as mean ± SD. CS; contrast sensitivity, P1 difference between normal and mild,

P2difference between normal and advanced, P3 difference between mild and advanced.

^*P significant if < 0.05, t test.