Research Article
Calculation of Toric Intraocular Lens Power with the Barrett Calculator and Data from Three Keratometers
Table 2
Mean anterior corneal keratometry values obtained using iTrace, IOLMaster, and Pentacam.
| | iTrace at 3 mm | IOLMaster at 2.3 mm | Pentacam at 3 mm | (n = 101) | (n = 101) | (Centered on the corneal apex) (n = 101) |
| Astigmatism magnitude (D) | 1.86 ± 0.77 | 1.95 ± 0.87 | 1.83 ± 0.79 | Range: 0.61–4.23 | Range: 0.34–4.50 | Range: 0.40–3.80 | Astigmatism axis (degree) | 97 ± 68 | 99 ± 64 | 94 ± 47 | Range: 0–179 | Range: 1–179 | Range: 0–179 | Flat keratometry (D) | 43.69 ± 1.58 | 44.04 ± 1.61 | 44.01 ± 1.58 | Range: 39.58–47.74 | Range: 39.57–47.74 | Range: 39.40–47.60 | Steep keratometry (D) | 45.55 ± 1.62 | 45.99 ± 1.57 | 45.84 ± 1.60 | Range: 41.02–48.77 | Range: 42.13–49.41 | Range: 41.10–49.10 | Mean keratometry (D) | 44.62 ± 1.55 | 45.02 ± 1.53 | 44.92 ± 1.54 | Range: 40.30–48.26 | Range: 40.85–48.51 | Range: 40.25–48.25 |
|
|
D: diopter.
|