Table 2.

The number of individuals (%) at different levels of percentage difference

	Photopic		Scotopic
	Single flash	30 Hz flicker	Isolated (blue)	Maximal white	30 Hz flicker
10% difference or lower	35 (44)	40 (51)	44 (56)	46 (58)	41 (52)
20% difference or lower	67 (85)	61 (77)	66 (84)	66 (84)	66 (84)
30% difference or lower	74 (94)	69 (87)	76 (96)	77 (97)	73 (92)

The interocular percentage difference for the above five stimuli had no statistically significant relation with age (Spearman rank order p values from 0.471 to 0.806), or with the averaged b-wave amplitude for the two eyes (Spearman rank order p values from 0.070 to 0.441).