Table 2.
Changes in spherical equivalent refraction (mean±SD), axial length, and corneal curvature over the course of 18 months for single-vision contact lens, multistage +1.50D, and proclear +3.00D multifocal contact lenses
| Refractive error (D) | Axial length (mm) | K-reading (mm) | |
|---|---|---|---|
| SVCL | |||
| Baseline | −3.82±1.25D | 24.41±0.66 | 7.761±0.28 |
| 6 months | −4.14±1.17D | 24.57±0.62 | - |
| 12 months | −4.26±1.09D | 24.62±0.57 | - |
| 18 months | −4.39±1.13D | 24.69±0.61 | 7.758±0.27 |
| Progression/18 months | −0.57±1.68D | 0.228±0.89 | -0.0027±0.39 |
| Multistage +1.50 | |||
| Baseline | −4.38±0.98D | 24.37±0.94 | 7.690±0.23 |
| 6 months | −4.65±0.97D | 24.47±0.95 | - |
| 12 months | −4.78±1.03D | 24.54±0.95 | - |
| 18 months | −4.73±1.05D | 24.53±0.95 | 7.686±0.22 |
| Progression/18 months | −0.35±1.44D | 0.157±1.34 | -0.003±0.32 |
| Proclear +3.00 | |||
| Baseline | −3.59±1.14D | 24.56±0.70 | 7.765±0.16 |
| 6 months | −3.68±1.14D | 24.63±0.76 | - |
| 12 months | −3.78±1.11D | 24.62±0.76 | - |
| 18 months | −3.78±1.14D | 24.64±0.74 | 7.786±0.16 |
| Progression/18 months | −0.19±1.61D | 0.084±1.02 | 0.021±0.22 |
D=Diopter; K-reading=Corneal curvature; SVCL=Single-vision contact lens