Evaluation of Central Corneal Thickness Using Corneal Dynamic Scheimpflug Analyzer Corvis ST and Comparison with Pentacam Rotating Scheimpflug System and Ultrasound Pachymetry in Normal Eyes

Table 4

Summary of previous studies for the agreement of CCT measurements obtained by other Scheimpflug systems, Orbscan II and specular microscopes in comparison to Pentacam or ultrasound pachymetry.

Author (year)	Patients/eyes	Device pairings	Mean difference (μm) ± SD	value	95% LoA (μm)
Lanza et al. [27] (2015)	102/102	Pentacam-Orbscan II	13.66 ± 16.53	<0.0001	−18.74 to 46.06
		Sirius-Orbscan II	15.18 ± 17.16	<0.0001	−18.45 to 48.81
		Sirius-Pentacam	1.52 ± 6.21	0.015	−10.65 to 13.69
Khaja et al. [28] (2015)	32/32	USP-Orbscan II	2.8 ± 0.28	NA	−30.15 to 24.40
		USP-specular microscopy	8.69 ± 1.24	NA	−8.82 to 27.4
Smedowski et al. [29] (2014)	76/152	Corvis ST-Pentacam	NA	>0.05	NA
		Corvis ST-USP	NA	>0.05	NA
Huang et al. [30] (2014)	66/66	Pentacam-Sirius	−3.3 ± 5.2	<0.001	−13.6 to 6.9
		Pentacam-Galilei	−9.3 ± 3.7	<0.001	−16.6 to −2.0
		Sirius-Galilei	−6.0 ± 4.0	<0.001	−13.8 to 1.9
Anayol et al. [31] (2014)	32/32	Galilei-Pentacam	13.93 ± 0.88	<0.001	11.74 to 16.12
		Galilei-Sirius	14.66 ± 0.69	<0.001	12.96 to 16.37
		Pentacam-Sirius	0.73 ± 0.93	1.0	−1.50 to 3.02
Maresca et al. [32] (2014)	35/35	Sirius-USP	−13.9 ± 14.4	<0.001	−42.2 to 14.4
Feizi et al. [33] (2014)	88/88	USP-Orbscan	−14.5 ± 22.9	<0.001	−59.4 to 30.4
		USP-Galilei	−16.0 ± 19.6	<0.001	−54.5 to 22.5
		Orbscan-Galilei	−1.5 ± 17.0	0.99	−34.8 to 31.9
De La  Parra-Colín et al. [34] (2014)	16/16	Sirius-Pentacam	−10.1 ± 9.0	NA	−27.7 to 7.5
Jorgel  et al. [35] (2013)	50/50	Sirius-USP	4.68 ± 10.47	0.003	−15.84 to 25.20
Bayhan et al. [36] (2014)	50/50	USP-Sirius	17.58 ± 8.13	<0.001	15.27 to 19.89
Huang et al. [37] (2013)	43/43	Sirius-USP	6.88 ± 6.77	0.000	−6.39 to 20.14
Nassiri et al. [38] (2014)	32/61	Pentacam-USP	−1 ± 9	0.32	−20 to 17
		Orbscan II-USP	6 ± 14	<0.001	−21 to 33
Al Farhan et al. [39] (2013)	30/30	USP-specular microscopy	−2.40 ± 9.10	0.16	−38.70 to 39.90
Tai et al. [40] (2013)	92/184	Pentacam-USP	10.08 ± 10.96	0.012	−11.40 to 31.56
		Specular microscopy-USP	−20.49 ± 8.91	<0.001	−37.95 to −3.04
		Specular microscopy-Pentacam	−30.57 ± 10.26	<0.001	−59.69 to −10.45
Chen et al. [41] (2012)	35/35	Pentacam-USP	5.27 ± 9.55	0.007	−24.0 to −13.4
Aramberri et al. [42] (2012)	35/35	Pentacam-Galilei	−2.76 ± 4.52	<0.01	−6.1 to 11.6
González-Pérez et al. [43] (2011)	22/22	USP-Pentacam	3 ± 10	0.233	−16.2 to 21.2
		USP-Orbscan II	32 ± 15	<0.001	3.1 to 60.8
		USP-specular microscopy	26 ± 37	0.004	−46.2 to 97.8
		Pentacam-Orbscan II	29 ± 11	<0.001	7.2 to 51.6
		Pentacam-specular microscopy	23 ± 32	0.003	−40.2 to 86.2
		Orbscan II-specular microscopy	−6 ± 35	0.399	−74.8 to 62.0
		USP-Orbscan II	−15 ± 17	0.001	−47.9 to 18.7
		Pentacam-Orbscan II	−17 ± 14	<0.001	−43.9 to 9.8