Table 1.
Description of Pentacam indices.
| TP | Minimum corneal thickness | CKI | Central keratoconus index |
| AP | Corneal thickness at apex | Rmin | Minimum sagittal curvature |
| RPIavg | Average pachymetric progression index | ACD | Anterior chamber depth |
| RPImax | Maximum pachymetric progression index | ACv | Anterior chamber volume |
| RPImin | Minimum pachymetric progression index | CV | Corneal volume |
| ARTmax | Maximum Ambrosio relational thickness | AE | Maximum anterior elevation in 5 mm zone above the best fit sphere |
| ARTavg | Average Ambrosio relational thickness | PE | Maximum posterior elevation in 5 mm zone above the best fit sphere |
| BAD_D | Belin/Ambrosio enhanced ectasia total deviation value | AEdif | Difference of maximum–minimum anterior elevation above/below the best fit sphere |
| MEAN keratometry | PEdif | Difference of maximum–minimum posterior elevation above/below the best fit sphere | |
| Maximum keratometry front | CKI | Central keratoconus index | |
| IVA | Index of vertical asymmetry | Rmin | Minimum sagittal curvature |
| ISV | Index of surface variance | ACD | Anterior Chamber Depth |
| IHD | Index of height decentration | KI | keratoconus index |
| IHA | Index of height asymmetry | Corneal and total values of higher order aberrations and all Zernike indices | |