Table 4.
Proposed Standardized Methodology in Postoperative Refractive Studies According to Hoffer and Savini
| Article | Hoffer and Savini45 | Doga et al16 | Hovanesian et al – CsA17 | Kim et al18 | Hovanesian et al – Lifitegrast19 |
|---|---|---|---|---|---|
| Visual acuity | 0.5 or better | 0.33 ± 0.21 | No information | No information | No information |
| Bilateral eyes | 1 eye for each patient | 1 eye for each patient | 1 eye for each patient | 1 eye for each patient | 1 eye for each patient |
| Alpha= 0.05 | Significance level (α) 0.05 | No information | No information | Alpha= 0.05 | Alpha= 0.05; calculated before examination |
| Demographics | Age, gender, ethnicity | Age, gender | Age, gender | Age, gender | Age, gender |
| Constant optimization | Minimum 100 eyes, leading to a zero mean PE in the analyzed sample | No information | No information | Performed (500 eyes) | No information |
| Formulas | Chosen by a surgeon | No information | Barrett Universal II | SRK/T and Barrett Universal II | Chosen by a surgeon |
| Refraction – time after surgery | 2 weeks- 1 month | 1 month | Approximately 1 month | 1 month | 28 days |
| Refraction - distance | 6m | No information | No information | No information | No information |
| Correction | The best spherical equivalent | Yes | Yes | Yes | Yes |
| Analysis of the PE | PE with SD, MedAE, MAE, the percentage of eyes with an absolute PE within ±0.25 D, ±0.50 D, ±0.75 D and ±1.00 D | The percentage of eyes with an absolute PE within ±0.25 D, ±0.50 D and ±1.00 D | MAE, The percentage of eyes with an absolute PE within ±0.25 D, ±0.50 D and ±0.75 D | ME, MAE The percentage of eyes with an absolute PE within ±0.25 D, ±0.50 D and ±0.75 D, refractive surprises ≥ 0.75 D |
The percentage of eyes with an absolute PE within ±0.25 D, ±0.50 D and ±0.75 D |
Abbreviations: CsA, cyclosporin A; PE, prediction error; SD, standard deviation; MedAE, median absolute error; MAE, mean absolute error; ME, mean error.