Research Article
Comparison of Predictability Using Barrett Universal II and SRK/T Formulas according to Keratometry
Table 4
Summary of previous studies on the predictability of intraocular lens power calculation in eyes with steep and flat corneas.
| Author | Number of eyes | Mean keratometric readings (D) | IOL calculation formula | Prediction error (D) | Within ± 0.5 D (%) | Within ± 1.0 D (%) |
| Faramarzi et al [9] | 45 | 46≦ | SRK/T | −0.06 ± 0.52 | 78 | 89 | Holladay1 | 0.21 ± 0.51 | 64 | 96 | Haigis | 0.16 ± 0.55 | 64 | 93 | Hoffer Q | 0.36 ± 0.51 | 58 | 91 |
| Reitblat et al [10] | 79 | 46< | Barrett Universal II | −0.04 ± 0.45 | 76 | 96 | SRK/T | −0.31 ± 0.54 | 61 | 91 | Hill-RBF | −0.17 ± 0.35 | 83 | 98 | Hoffer Q | 0.18 ± 0.57 | 70 | 92 | Holladay1 | −0.06 ± 0.52 | 70 | 94 | Holladay2 | −0.04 ± 0.51 | 73 | 96 | Olsen-A | 0.07 ± 0.41 | 78 | 99 | Olsen-C | 0.18 ± 0.41 | 68 | 99 | Haigis | 0.17 ± 0.42 | 71 | 97 | 92 | <42 | Barrett Universal II | −0.07 ± 0.26 | 97 | 100 | SRK/T | 0.16 ± 0.31 | 86 | 100 | Hill-RBF | −0.14 ± 0.26 | 88 | 100 | Hoffer Q | −0.22 ± 0.68 | 80 | 96 | Holladay1 | 0.04 ± 0.39 | 83 | 99 | Holladay2 | −0.02 ± 0.35 | 86 | 99 | Olsen-A | −0.06 ± 0.31 | 91 | 98 | Olsen-C | −0.17 ± 0.33 | 90 | 99 | Haigis | −0.31 ± 0.31 | 75 | 97 |
| Current | 86 | 47≦ | Barrett Universal II | 0.08 ± 0.49 | 71 | 97 | SRK/T | −0.49 ± 0.63 | 60 | 84 | 69 | <42 | Barrett Universal II | 0.15 ± 0.42 | 74 | 96 | SRK/T | 0.27 ± 0.40 | 70 | 94 |
|
|