Table 5.
Axial Elongation in Millimeters Reported in the Various Studies Involving Orthokeratology
| Author, Year | Lenses | Eye | 12 Months | 18 Months | 24 Months |
|---|---|---|---|---|---|
| Guo et al. 2021151 | OK (BOZD 6 mm) (n = 32) | 0.17 ± 0.13 | |||
| OK (BOZD 5 mm) (n = 26) | 0.04 ± 0.15 | ||||
| Lau et al. 2022153 | OK (n = 29)* | 0.53 ± 0.29 | |||
| OK (IC) (n = 35) | 0.35 ± 0.29 | ||||
| Loertscher et al. 2021 (n = 28)150 | OK (1 eye) | 0.129 | |||
| OK (MF) (the other eye) | −0.044 | ||||
| Long et al. 2020154 | |||||
| Unilateral anisometropes | SV spectacles (n = 38) | NME | 0.31 ± 0.32 | ||
| ME | 0.33 ± 0.29 | ||||
| OK (n = 79) | NME† | 0.34 ± 0.21 | |||
| ME | 0.05 ± 0.19 | ||||
| Bilateral anisometropes | SV spectacles (n = 37) | LME | 0.35 ± 0.28 | ||
| MME | 0.38 ± 0.21 | ||||
| OK (n = 98) | LME | 0.15 ± 0.19 | |||
| MME | 0.05 ± 0.17 | ||||
| Tan et al. 2022166 | OK (n = 35) | 0.35 ± 0.20 | |||
| OK (A) (n = 34) | 0.17 ± 0.19 |
A, 0.01% atropine; IC, increased compression by 1 D; LME, less myopic eye; ME, myopic eye; MME, more myopic eye; NME, nonmyopic eye.
*
Lens parameters were not modified to correct significant residual myopia (if any), to maintain 1 D difference in compression factor between the two groups of subjects.
†
No lens wear.