Corneal Epithelial Thickness Mapping: A Major Review

Table 1

Optical coherence tomography devices currently used in corneal epithelial thickness mapping.

Device name	Technology	Axial resolution (μm)	Wavelength (nm)	Scan diameter (mm)	Speed (A-scan/second)/acquisition time (s)
Artemis 2 (Arc scan) [30]	VHF-US	1	Ultrasound	10	NM/120 to 180
Anterion (Heidelberg Engineering) [43]	SS-OCT	10	1300	7	50,000; <1
Avanti/RTVue (Optovue, Inc) [43]	SD-OCT	5	840	6–9	Avanti: 70,000; RTVue: 26,000; 0.58
Cirrus 5000 (Carl Zeiss Meditec) [44, 45]	SD-OCT	5	840	9	68,000; NM
MS39 (CSO) [46, 47]	Combined Placido-based topographer and SD-OCT	3.6	845	8	30,000; NM
REVO NX (Optopol Technology) [48]	SD-OCT	5	830	8	110,000; 0.17
RS 3000 (Nidek Co) [49, 50]	SD-OCT	4	NM	8	53,000; NM

NM: not mentioned, OCT: optical coherence tomography, SD: spectral domain, and VHF-US: very high-frequency ultrasound.