Table 1
Intrasession coefficients of repeatability (CORs) of in vivo methods for the measurement of central corneal thickness in humans
| Total cornea | Epithelium | ||||
|---|---|---|---|---|---|
| Instrument | Mean (SD) | COR | Mean (SD) | COR | Ref |
| TSCM = tandem scanning confocal microscope; SSCM = slit scanning confocal microscope; OCT = optical coherence tomography. *Indicates same day, non-consecutive repeats (average delay of 302 (SD 83) minutes). †Indicates repeats performed on different day but at the same time of day. | |||||
| Optical | 539 (33) | 26.6* | – | – | 175 |
| Modified optical | 529 (31) | 4.5 | 53 (9) | 3.8 | 56 |
| Ultrasound | 581 (34) | 10.1 | – | – | 59 |
| Specular | 533 (48) | 11.8 | – | – | 176 |
| Orbscan | 596 (40) | 11.5* | – | – | 175 |
| TSCM | 532 (19) | 24.5 | 51 (4) | 7.8 | 55 |
| SSCM | 538 (40) | 113.6 | 60 (13) | 37.3 | 56 |
| OCT | 530 (32) | 9.9 | 58 (3) | 6.1† | 59, 60 |
