Factor 3 cpd 6 cpd 12 cpd 18 cpd CCT 0.0011* 0.083 0.051 0.049* DCNVA 0.028* 0.036* 0.060 0.020* MRSE - - - 0.66

*denotes statistically significant. CCT: Central Corneal Thickness; DCNVA: Distance-Corrected Near Visual Acuity; MRSE: Absolute Values of Manifest Refraction Spherical Equivalent; -: not selected in step-wise analysis.

Table 2: P values obtained with step-wise multiple regression analysis for contrast sensitivity at each spatial frequency.