Journal of Ophthalmology / 2018 / Article / Tab 3

Research Article

Comparison of Color Light-Emitting Diode Corneal Topographer and Dual Rotating Scheimpflug–Placido Topographer

Table 3

Comparison of corneal index measurements using dual rotating Scheimpflug–Placido and color light-emitting diode corneal topographers.

ParameterDRSP (mean ± SD)Color LED (mean ± SD)Difference valueICC
Mean ± SD95% CI

Postrefractive group
Anterior corneal indices (D)
 simK38.78 ± 1.8038.71 ± 1.88−0.08 ± 0.44−0.19, 0.040.1860.986
 Astigmatism magnitude0.83 ± 0.470.84 ± 0.530.01 ± 0.37−0.09, 0.100.9040.938
J0−0.32 ± 0.28−0.29 ± 0.320.03 ± 0.20−0.02, 0.080.2670.925
J450.06 ± 0.22−0.04 ± 0.25−0.10 ± 0.15−0.14, −0.060.0000.905
Posterior corneal indices (D)
 simK−6.39 ± 0.16−5.97 ± 0.320.42 ± 0.320.34, 0.510.0000.327
 Astigmatism magnitude−0.36 ± 0.11−0.39 ± 0.21−0.04 ± 0.23−0.09, 0.020.2160.183
J00.17 ± 0.060.08 ± 0.16−0.09 ± 0.16−0.13, −0.050.0000.016
J45−0.02 ± 0.15−0.01 ± 0.06−0.01 ± 0.16−0.05, 0.030.6550.000
Normal group
Anterior corneal indices (D)
 simK43.28 ± 1.3743.40 ± 1.380.12 ± 0.260.06, 0.190.0010.991
 Astigmatism magnitude1.34 ± 0.831.41 ± 0.880.07 ± 0.35−0.02, 0.150.1330.956
J0−0.61 ± 0.44−0.64 ± 0.47−0.03 ± 0.17−0.08, 0.010.1350.963
J450.01 ± 0.250.00 ± 0.24−0.01 ± 0.14−0.04, 0.030.7400.916
Posterior corneal indices (D)
 simK−6.43 ± 0.27−6.26 ± 0.250.16 ± 0.120.13, 0.190.0000.944
 Astigmatism magnitude−0.37 ± 0.11−0.41 ± 0.17−0.04 ± 0.16−0.08, −0.000.0430.499
J00.17 ± 0.070.18 ± 0.090.01 ± 0.09−0.01, 0.040.2740.469
J450.00 ± 0.060.00 ± 0.09−0.00 ± 0.10−0.03, 0.030.9770.175

CI, confidence interval; color LED, color light-emitting diode corneal topographer; DRSP, dual rotating Scheimpflug–Placido corneal topographer; ICC, intraclass correlation coefficient; K, keratometry. Paired sample t-test.