Table 2 Mean threshold values and standard deviations under photopic (n = 14) and scotopic (n = 12) conditions for the retinal locations illustrated in fig 2

	Mean (SD)	Median	Mean for 9×9° area (SD)
Photopic (n = 14)
Foveal location	0.43 (0.25)	0.38
Eccentric location a (fig 3A)	0.59 (0.19)	0.58	0.48 (0.17)
Eccentric location b (fig 3C)	1.0 (0.44)	0.87	0.80 (0.40)
Scotopic (n = 12)
Foveal location	2.85 (0.37)	2.93
Eccentric location c (fig 3B)	0.76 (0.45)	0.90	1.4(0.89)
Eccentric location d (fig 3D)	0.91 (0.68)	0.98	0.74 (0.78)