Table 1.
Intracorneal ring features
| Design | Intacs | Kerarings |
|---|---|---|
| Arc length (degrees) | 150° | 90°–210° |
| Cross section | Hexagonal | Triangular |
| Thickness (mm) | 0.25–0.35 | 0.15–0.35 |
| Inner diameter (mm) | 6.77 | 5.00 |
| Outer diameter (mm) | 8.10 | 6.00 |
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