Table 4. Comparison of ALID between POAG patients and normal healthy (control) subjects.

Clock hour	POAG (µm)	Control (µm)	p *
3	240±71	194±51	0.001
4	242±68	208±56	0.009
5	261±80	218±53	0.003
6	281±83	207±44	<0.001
6.5	285±87	207±47	<0.001
7	252±87	188±48	<0.001
8	197±73	176±57	0.102
9	201±81	160±50	0.003
10	242±71	191±53	<0.001
11	293±86	234±55	<0.001
11.5	298±80	237±64	<0.001
12	318±102	259±46	<0.001
1	285±70	243±52	0.008
2	269±58	233±62	0.015
Mean†	256±54	209±37	<0.001

^* p values were calculated by the independent-t test. ^†Mean value was obtained by the average of every half clock hour meridian, although only half of the total measurements were displayed on this table.

ALID  =  anterior lamina cribrosa insertion distance; POAG  =  primary open angle glaucoma.