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Table 3 Comparison between the preoperative and postoperative DRS analyzer results for the FS-LASIK and SMILE groups

From: Comparison of anterior segment changes after femtosecond laser LASIK and SMILE using a dual rotating Scheimpflug analyzer

 

FS-LASIK

SMILE

Preoperative

Postoperative

p value

Preoperative

Postoperative

p value

ACD (mm)

3.29 ± 0.26

3.26 ± 0.26

< 0.001

3.30 ± 0.24

3.23 ± 0.25

< 0.001

Average K (D)

 Anterior

42.97 ± 1.51

40.28 ± 1.87

< 0.001

42.71 ± 1.43

39.91 ± 1.67

< 0.001

 Posterior

−6.18 ± 0.25

−6.22 ± 0.26

0.001

−6.13 ± 0.23

−6.16 ± 0.23

0.104

Anterior K (D)

 Flat

42.06 ± 1.52

39.61 ± 1.91

< 0.001

42.00 ± 1.42

39.25 ± 1.69

< 0.001

 Steep

43.89 ± 1.60

40.96 ± 1.86

< 0.001

43.41 ± 1.53

40.56 ± 1.72

< 0.001

Posterior K (D)

 Flat

−5.98 ± 0.24

−6.01 ± 0.24

0.012

−5.97 ± 0.22

−5.96 ± 0.23

0.218

 Steep

−6.38 ± 0.28

−6.43 ± 0.30

0.006

−6.23 ± 1.17

−6.37 ± 0.27

0.094

 MPE (μm)

7.46 ± 2.59

8.56 ± 2.97

< 0.001

7.11 ± 2.61

7.86 ± 2.78

0.001

BFSR (mm)

 Anterior

7.88 ± 0.27

8.33 ± 0.34

< 0.001

7.92 ± 0.25

8.43 ± 0.31

< 0.001

 Posterior

6.54 ± 0.25

6.53 ± 0.26

0.370

6.57 ± 0.23

6.54 ± 0.25

0.154

  1. DRS dual rotating Scheimpflug, FS-LASIK femtosecond laser-assisted laser in situ keratomileusis, SMILE small incision lenticule extraction, CCT central corneal thickness, ACD anterior chamber depth, K keratometric power, D diopters, MPE maximal posterior elevation, BFSR best-fit sphere radius
  2. *Significant at p = 0.01 (=0.05/5), using a Bonferroni adjustment to control for the 5 tests conducted