Table 2: Paired results from the two modalities.

		Paired Differences
		Mean	Std. Dvn	Std. Error Mean	95% Confidence Interval of the Difference		t	df	Sig. (2-tailed) P-value
		Mean	Std. Dvn	Std. Error Mean	Lower	Upper	t	df	Sig. (2-tailed) P-value
Pair 1	Snellen VA OD iPa d VA OD	0.04270	0.11423	0.01142	0.02004	0.06538	3.739	99	< 0.001^*
Pair 2	Snellen VA OS iPad VA OS	0.03036	0.09722	0.00972	0.01107	0.04965	3.123	99	0.002^*
Pair 3	PH Snellen VA OD PH iPad VA OD	0.01294	0.16327	0.03265	-0.05445	0.08034	0.396	24	0.695
Pair 4	PH Snellen VA OS PH iPad VA OS	-0.00391	0.12655	0.02435	-.005398	0.04615	-0.161	26	0.873

^*Significant at 0.05 level