Table 1 Comparison between the subgroups of ANN group (ICRS and ICRS+CXL), in preoperative and postoperative period

Pre-op

Grade of keratoconus

2.13 ± 1.13

2.67 ± 0.89

p > 0.05

UDVA [Decimal value (LogMAR)]

0.22 ± 0.14

(0.66)

0.14 ± 0.14

(0.85)

p > 0.05

CDVA [Decimal value (LogMAR)]

0.68 ± 0.24

(0.17)

0.53 ± 0.20

(0.28)

p > 0.05

SE (D)

−2.27 ± 2.92

−4.97 ± 3.82

p > 0.05

Sim-K Avg (D)

46.33 ± 2.79

48.38 ± 4.32

p > 0.05

CCT (μm)

475.63 ± 41.66

473.25 ± 42.28

p > 0.05

ThkMin (μm)

459.63 ± 45.63

456.83 ± 44.48

p > 0.05

Corneal volume (mm³)

54.53 ± 3.12

54.14 ± 2.90

p > 0.05

Total aberrations (μm)

4.44 ± 2.03

5.98 ± 2.79

p > 0.05

High Order aberrations (μm)

3.26 ± 1.76

3.98 ± 2.31

p > 0.05

Astigmatism aberrations (μm)

3.38 ± 1.28

3.78 ± 2.93

p > 0.05

Coma-like aberrations (μm)

3.16 ± 1.77

3.84 ± 2.30

p > 0.05

Spherical-like aberrations (μm)

0.81 ± 0.27

1.01 ± 0.38

p > 0.05

Post-op

UDVA [Decimal value (LogMAR)]

0.37 ± 0.21

(0.43)

0.36 ± 0.22

(0.44)

p > 0.05

CDVA [Decimal value (LogMAR)]

0.78 ± 0.18

(0.11)

0.70 ± 0.24

(0.15)

p > 0.05

SE (D)

−2.39 ± 2.22

−2.71 ± 2.61

p > 0.05

Sim-K Avg (D)

45.07 ± 2.28

45.50 ± 5.37

p > 0.05

CCT (μm)

478.38 ± 37.54

469.25 ± 55.85

p > 0.05

ThkMin (μm)

454.50 ± 47.66

433.75 ± 50.22

p > 0.05

Corneal volume (mm³)

55.24 ± 3.72

55.13 ± 3.07

p > 0.05

Total aberrations (μm)

3.91 ± 2.66

5.58 ± 2.72

p > 0.05

High Order aberrations (μm)

2.46 ± 0.73

3.93 ± 2.27

p > 0.05

Astigmatism aberrations (μm)

2.94 ± 2.86

3.81 ± 1.92

p > 0.05

Coma-like aberrations (μm)

2.09 ± 0.51

3.13 ± 1.78

p > 0.05

Spherical-like aberrations (μm)

1.20 ± 0.46

2.22 ± 1.65

p > 0.05