TABLE 1.

Patient Characteristics

	Average	SD
Age	75.2	9.6
Male	72.0	9.5
Female	77.0	9.3
Male:female ratio	40:69
Average no. glaucoma drugs taken	2
Patients taking prostaglandin (%)	67.0
Patients taking carbonic anhydrase   inhibitor (%)	45.9
Patients taking β-blocker (%)	58.7
Patients taking α-2-agonist (%)	30.3
	Average	SD
Days between first and third visit	229	79
Range in time of IOP measurement (h)	1.33	1.37
Percent with low reliability on VF testing	24.8%

IOP indicates intraocular pressure; VF, visual field.