Table 1.

Data from control and laser-treated eyes of monkeys that were used to derive an empirical structure-function relationship for glaucoma and the dynamic range of measurement for clinical perimetry.

		Eccentricity
		4.2 deg	12.8 deg	21.2 deg	24.0 deg
1	Normal density (cells/mm2)	48,982 ± 4,906	11,188 ± 1,290	4,986 ± 1,016	4,458 ± 898
2	Normal density (dB)	46.9 ± 0.4	40.2 ± 0.6	36.9 ± 0.9	36.4 ± 0.9
3	Normal threshold (asb)	3.7 ± 1.4	5.4 ± 1.4	8.9 ± 3.5	14.9 ± 11.5
4	Normal sensitivity (dB)	34.6 ± 1.4	32.8 ± 2.1	29.9 ± 3.0	29.4 ± 3.2
5	# Function slope (dB/dB)	1.25	1.47	2.1	2.3
6	# Function intercept (dB)	−25.2	−32.3	−46.2	−55.7
7	Single detector threshold (asb)	3.3 * 106	1.7 * 107	4.2 * 108	3.7 * 109
8	Cell density @ 2 SD loss (cells/mm2)	39,355	7,727	2,624	2.203
9	2 SD cell-loss (%)	20	26	50	51
10	2 SD cell-loss (dB)	0.9	1.6	3.0	3.1
11	Cell density @ 0 dB sensitivity (cells/mm2)	100	160	170	250
12	Cell density @ 0 dB sensitivity (dB)	20.0	22.0	22.2	24.0
13	Percent normal density @ 0 dB sensitivity	0.2	1.4	3.4	5.6
14	Dynamic range of SAP measurement (dB)	25.9	16.9	11.9	9.4

Abbreviations: dB – decibels, defined as 10-times the common logarithm. asb – unit of light intensity for perimetry stimuli, defined as the brightness of a perfectly diffusing surface reflecting or emitting one lumen per square meter.

^#The data for the slopes and intercepts were calculated by equations 1 and 2, respectively.