Background
Methods
Examinations and measurements
Surgical technique
Statistical analysis
Results
Characteristics | 23 eyes of 23 patients |
---|---|
Age, years old | 27.1 ± 4.4 (20 to 38) |
Sex (% women) | 26% |
Refractive errors (D) | |
Sphere | −1.41 ± 2.30 (−7.50 to 2.75) |
Cylinder | −1.83 ± 1.37 (−5.00 to 0.00) |
MRSE | −2.33 ± 2.22 (−8.00 to 1.25) |
Keratometric value | |
Flat K | 46.5 ± 3.2 (41.3 to 56.3) |
Steep K | 48.0 ± 3.6 (43.3 to 57.8) |
Mean K | 47.2 ± 3.1 (42.5 to 55.0) |
logMAR UDVA | 0.85 ± 0.27 (0.30 to 1.30) |
logMAR CDVA | 0.25 ± 0.18 (0.10 to 0.70) |
Optical zone (mm) | 6.84 ± 0.36 (6.26 to 7.50) |
Total ablation zone (mm) | 7.88 ± 0.48 (6.89 to 8.59) |
Ablation depth (μM) | 34.17 ± 11.60 (14.23 to 54.85) |
CCT (μM) | 463.9 ± 30.5 (415.0 to 541.0) |
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
| |
---|---|---|---|---|---|---|---|---|---|---|---|
logMAR UDVA | 0.85 ± 0.27 (0.30 to 1.30) | 0.58 ± 0.27 (0.18 to 1.10) | < .001 | 0.29 ± 0.29 (−0.20 to 1.20) | 0.37 ± 0.30 (−0.10 to 0.80) | .999 | 0.17 ± 0.14 (−0.10 to 0.54) | .169 | .038 | <.001 | <.001 |
logMAR CDVA | 0.25 ± 0.18 (0.10 to 0.70) | 0.19 ± 0.20 (0.00 to 0.70) | .898 | 0.13 ± 0.07 (0.00 to 0.30) | 0.10 ± 0.07 (0.00 to 0.20) | .092 | 0.07 ± 0.06 (0.00 to 0.20) | .002 | .109 | <.001 | .024 |
Refractive errors (D) | |||||||||||
Sphere | −1.41 ± 2.30 (−7.50 to 2.75) | −0.14 ± 1.33 (−3.75 to 2.25) | .002 | −0.14 ± 1.28 (−4.75 to 1.50) | −0.02 ± 0.99 (−2.75 to 1.25) | .999 | 0.08 ± 0.85 (−2.00 to 1.25) | .999 | .999 | .046 | .999 |
Cylinder | −1.83 ± 1.37 (−5.00 to 0.00) | −2.06 ± 1.10 (−5.25 to −0.50) | .999 | −1.56 ± 1.21 (−5.00 to −0.25) | −1.42 ± 1.25 (−5.00 to −0.25) | .999 | −1.07 ± 0.73 (−3.00 to −0.25) | .023 | .145 | .059 | .020 |
MRSE | −2.33 ± 2.22 (−8.00 to 1.25) | −1.17 ± 1.19 (−4.50 to 1.00) | .002 | −0.92 ± 1.50 (−5.63 to 0.88) | −0.73 ± 1.26 (−4.50 to 0.75) | .999 | −0.46 ± 0.99 (−3.50 to 0.75) | .131 | .119 | .005 | .280 |
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
| |
---|---|---|---|---|---|---|---|---|---|---|---|
Kmax (D) | 55.35 ± 5.51 | 53.16 ± 5.39 | .001 | 48.04 ± 3.40 | 47.87 ± 3.43 | .914 | 47.71 ± 3.47 | .143 | .389 | <.001 | <.001 |
Apex K (D) | 55.27 ± 5.30 | 51.56 ± 6.05 | <.001 | 45.98 ± 4.18 | 45.53 ± 4.07 | .999 | 45.40 ± 4.00 | .999 | .999 | <.001 | <.001 |
Mean K (D) | 46.62 ± 2.87 | 45.03 ± 2.82 | .001 | 43.16 ± 2.78 | 42.99 ± 2.83 | .999 | 42.93 ± 2.84 | .999 | .999 | <.001 | <.001 |
ISV | 85.48 ± 29.26 | 76.83 ± 23.09 | .365 | 53.43 ± 17.67 | 50.78 ± 14.55 | .348 | 50.13 ± 14.28 | .167 | .999 | <.001 | <.001 |
IVA | 1.01 ± 0.32 | 0.87 ± 0.29 | .214 | 0.45 ± 0.26 | 0.45 ± 0.23 | .999 | 0.44 ± 0.22 | .999 | .999 | <.001 | <.001 |
KI | 1.24 ± 0.10 | 1.18 ± 0.07 | .002 | 1.08 ± 0.07 | 1.07 ± 0.07 | .999 | 1.05 ± 0.06 | .130 | .999 | <.001 | <.001 |
Pachy (μm) | 464.74 ± 31.28 | 469.96 ± 37.15 | .752 | 412.04 ± 35.33 | 419.26 ± 31.46 | .551 | 434.61 ± 25.34 | <.001 | <.001 | <.001 | <.001 |
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 |
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
| |
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Radius (mm) | 5.33 ± 0.98 (3.56 to 8.05) | 4.89 ± 0.71 (3.89 to 6.52) | .042 | 4.34 ± 0.54 (2.98 to 5.10) | 4.51 ± 0.65 (3.00 to 5.60) | .093 | 4.78 ± 0.67 (3.09 to 5.85) | < .001 | .023 | .012 | .999 |
DA (mm) | 1.09 ± 0.13 (0.89 to 1.43) | 1.07 ± 0.11 (0.88 to 1.36) | .938 | 1.08 ± 0.11 (0.91 to 1.39) | 1.03 ± 0.10 (0.91 to 1.35) | .014 | 1.01 ± 0.11 (0.86 to 1.36) | .008 | .844 | .012 | .042 |
MCP (1/mm) | 0.19 ± 0.03 (0.12 to 0.28) | 0.21 ± 0.03 (0.15 to 0.26) | .047 | 0.23 ± 0.03 (0.20 to 0.34) | 0.23 ± 0.04 (0.18 to 0.33) | .371 | 0.21 ± 0.03 (0.17 to 0.32) | < .001 | .034 | .005 | .999 |