OK lenses | DRL | Euclid |
---|---|---|
Design | Base curve, reverse curve, alignment curve and peripheral curve | Base curve, reverse curve, alignment curve, and peripheral curve |
TD | 8.0–12.6 mm | 9.6–11.6 mm |
BOZD | 5.0Â mm | 6.2Â mm |
RCW | 0.8–1.6 mm | 0.5–0.6 mm |
ACW | 0.3–1.1 mm | 0.9–1.6 mm |
Central thickness | 0.20–0.25 mm | 0.20–0.32 mm |
Dk | 100 × 10–11(cm2/s) [mlO2/(ml·mm Hg)] | 87 × 10–11(cm2/s)·[mlO2/(ml·mm Hg)] |
Material | Boston XO | Boston Equalens II |
SCLs | DISC | Single-vision SCLs |
---|---|---|
Design | Concentric-ring and dual-focus | Single-vision |
Base curve | 8.6Â mm | 8.6Â mm |
Defocus addition |  + 2.50 D | None |
TD | 14.2Â mm | 14.2Â mm |
Central optical zone | 3.0Â mm | 8.0Â mm |
Water content | 38% | 38% |
Central thickness | 0.1Â mm | 0.1Â mm |
Dk | 8.4 × 10–11 (cm2/s) ·[mlO2/(ml·mm Hg)] | 8.4 × 10–11 (cm2/s)·[mlO2/(ml·mm Hg)] |
Material | hydroxyethyl methacrylate | hydroxyethyl methacrylate |