Table 3.
Correlation between corneal topography indices improvements and visual acuity improvements resulted from single-segment Intacs implantation.
| Parameter | Spearman correlation |
|
|---|---|---|
| With UCVA | With BSCVA | |
| ISV | 0.32a | 0.23 |
| IVA (mm) | 0.27 | 0.05 |
| KI | 0.24 | 0.19 |
| IHD (μm) | 0.14 | 0.06 |
| IHA (μm) | −0.085 | 0.04 |
| R min. (mm) | −0.016 | −0.32a |
ISV: Index of surface variance, IVA: Index of vertical asymmetry, KI: Keratoconus index, IHA: Index of height asymmetry, IHD: Index of height decentration, R Min: Minimum radius of curvature, UCVA: Uncorrected visual acuity, BSCVA: Best spectacle corrected visual acuity.
a
Correlation is significant at the 0.05 level (2-tailed).