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

Table 4

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

Parameter	Total group
	DRSP (mean ± SD)	Color LED (mean ± SD)	Difference		value	ICC
			Mean ± SD	95% CI
Anterior corneal indices (D)
simK	41.07 ± 2.76	41.09 ± 2.87	0.03 ± 0.37	-0.04, 0.09	0.451	0.996
Astigmatism magnitude	1.09 ± 0.72	1.13 ± 0.78	0.04 ± 0.36	−0.03, 0.10	0.256	0.938
J0	−0.46 ± 0.39	−0.47 ± 0.44	−0.00 ± 0.19	−0.04, 0.03	0.874	0.947
J45	0.04 ± 0.24	−0.02 ± 0.25	−0.05 ± 0.15	−0.08, 0.03	0.000	0.906
Posterior corneal indices (D)
simK	−6.41 ± 0.22	−6.12 ± 0.32	0.29 ± 0.27	0.24, 0.34	0.000	0.681
Astigmatism magnitude	−0.36 ± 0.11	−0.40 ± 0.19	−0.04 ± 0.20	−0.07, −0.00	0.027	0.334
J0	0.17 ± 0.06	0.13 ± 0.13	−0.04 ± 0.14	−0.06, −0.01	0.004	0.180
J45	−0.01 ± 0.06	−0.01 ± 0.12	−0.00 ± 0.13	−0.03, 0.02	0.695	0.000

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.