Table 2.

Numerical ratings of phosphene perceptions by each subject. All subjects were asked to rate their phosphene perceptions from 1 to 10 with 1 being “no phosphenes” and 10 being a completely white field.

	T7-T8	Fpz-Oz
Subject 1	2	5
Subject 2	5	7
Subject 3	3.5	4
Subject 4	3	7
Subject 5	3.5	6
Subject 6	4	7
Average	3.5	6