Table 3.

Mean Contrast Sensitivity With the MDS Test and Pelli-Robson Test by Group

Test	RVO (n = 20)	Control (n = 20)	P Value
MDS edge-width 3
α (mean, SD)	0.0276 (.0534)	0.0141 (.0234)	0.1047
β (mean, SD)	0.1127 (.0748)	0.1109 (.0550)	0.4580
MDS edge-width 6
α (mean, SD)	0.001 (0.0131)	0.0061 (.001)	0.0193*
β (mean, SD)	0.1227 (0.0748)	0.127 (0.0667)	0.3901
Pelli-Robson, log CS
Mean (SD)	1.53 (0.1727)	1.695 (0.1385)	0.0001*

Quantitative data from the MDS and Pelli-Robson test. The symbol α represents the threshold level for the threshold versus contrast ratio curve and β represents the slope of the threshold versus contrast ratio curve.

^*Indicates that the P value is significant and < 0.05.