Table 3.

Mean (±SD) scores for the two kinds of low-contrast letter acuity (LCLA) tests in all participants. The mean difference and 95% limits of agreement (LoA) are also shown. Paired T-test was used to compare two tests.

	Agreement between two tests in the all participants
	2.5% Contrast Level (N=39)				10% Contrast Level (N=49)
Automated	Sloan	Mean difference	T-test & P-value	95% LoA	Automated	Sloan	Mean difference	T-test & P-value	95% LoA
0.75 (0.20)	0.71 (0.17)	−0. 04 (0.10)	T= −2.195; P=.005*	±0.19	0.51 (0.33)	0.38 (0.30)	−0.13 (0.12)	T= −7.06; P<.001*	±0.24

^*indicates statistical significance.