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Table 4 Preoperative and postoperative corneal higher-ordrer aberrations in eyes undergoing combined corneal wavefront-guided transepithelial photorefractive keratectomy and accelerated corneal collagen cross-linking after intracorneal ring segment implantation in patients with moderate keratoconus

From: Visual rehabilitation in moderate keratoconus: combined corneal wavefront-guided transepithelial photorefractive keratectomy and high-fluence accelerated corneal collagen cross-linking after intracorneal ring segment implantation

 

Preop

(Baseline, before ICRS)

Before tPRK-CXL

P a

1 mon after tPRK-CXL

3 mon after tPRK-CXL

P b

6 mon after tPRK-CXL

P c

P d

P e

P f

RMS HOAs (μm)

2.87 ± 1.16

(0.28 to 5.97)

2.54 ± 1.18

(0.23 to 5.83)

.999

1.51 ± 0.65

(0.60 to 2.96)

1.23 ± 0.51 (0.52 to 2.39)

.025

1.08 ± 0.49 (0.45 to 2.28)

< .001

< .001

< .001

< .001

Spherical Aberration (μm)

0.15 ± 0.58

(−1.32 to 0.88)

0.03 ± 0.45

(−1.13 to 0.59)

.797

−0.13 ± 0.41

(−1.23 to 0.39)

0.35 ± 0.49

(−0.33 to 2.15)

.092

0.30 ± 0.33

(−0.88 to 0.65)

.008

.999

.999

.128

Coma Aberration (μm)

2.47 ± 1.00

(1.27 to 5.58)

2.07 ± 1.11

(0.11 to 5.33)

.102

0.74 ± 0.54

(0.13 to 2.45)

0.72 ± 0.52 (0.11 to 2.13)

.999

0.69 ± 0.49 (0.11 to 2.09)

.999

.789

< .001

< .001

  1. Results are expressed as means ± standard deviation (range)
  2. Preop preoperative, ICRS intracorneal ring segment implantation, tPRK-CXL corneal wavefront-guided transepithelial photorefractive keratectomy and corneal collagen cross-linking, RMS HOAs root mean square higher-order aberrations
  3. a P value between baseline and before tPRK-CXL
  4. b P value between 1 month and 3 months after tPRK-CXL
  5. c P value between 1 month and 6 months after tPRK-CXL
  6. d P value between 3 months and 6 months after tPRK-CXL
  7. e P value between baseline and 6 months after tPRK-CXL
  8. f P value between before tPRK-CXL and 6 months after tPRK-CXL