Table 4. The objective visual quality with iTrace analyzer of two groups.

Objective visual quality	Group tri839	Group TFNT	P
Preoperative
Total MTF10	-	-	-
Total MTF30	-	-	-
Total MTF avg	0.081±0.059	0.083±0.072	0.874
Total SR	0.009±0.014	0.014±0.035	0.946
Total MTF avg without correction	-	-	-
Total SR without correction	-	-	-
1wk postoperatively
Total MTF10	0.533±0.208	0.533±0.160	0.517
Total MTF30	0.204±0.123	0.183±0.755	0.490
Total MTF avg	0.450±0.175	0.449±0.127	0.599
Total SR	0.330±0.226	0.328±0.167	0.967
Total MTF avg without correction	0.207±0.072	0.344±0.178	0.000a
Total SR without correction	0.046±0.042	0.113±0.070	0.000a
1mo postoperatively
Total MTF10	0.540±0.149	0.534±0.164	0.813
Total MTF30	0.193±0.083	0.191±0.081	0.971
Total MTF avg	0.459±0.139	0.429±0.160	0.637
Total SR	0.409±0.202	0.345±0.178	0.332
Total MTF avg without correction	0.250±0.082	0.287±0.099	0.256
Total SR without correction	0.087±0.074	0.121±0.092	0.161
3mo postoperatively
Total MTF10	0.550±0.147	0.524±0.131	0.688
Total MTF30	0.203±0.100	0.196±0.112	0.891
Total MTF avg	0.429±0.160	0.446±0.113	0.696
Total SR	0.372±0.164	0.350±0.211	0.725
Total MTF avg without correction	0.269±0.139	0.286±0.045	0.364
Total SR without correction	0.105±0.121	0.010±0.031	0.265

MTF: Modulated transfer function; MTF avg: The average height of modulated transfer function; SR: Strehl ratio.

mean±SD