Table 9. Measured values of N1 and P1 implicit times in the 'unaffected' quadrant of affected eyes.

Visit	N1 Implicit Time			P1 Implicit Time
	Mean (milli-seconds)	Standard Deviation	P value for paired t-test in comparison to the values ‘at presentation’	Mean (milli-seconds)	Standard Deviation	P value for paired t-test in comparison to the values ‘at presentation’
At presentation	16.61	1.39	-	30.80	2.03	-
1st follow-up	16.24	2.08	0.321 (2.22, 8.15)	30.31	2.31	0.090 (-0.16, 2.02)
2nd follow-up	16.06	1.05	0.213 (-0.66, 1.83)	29.29	1.49	0.050 (0.02, 4.53)