Table 4. Conventional hydrogel contact lens material characteristics.
| Material type | Conventional hydrogel | |
|---|---|---|
| USAN |
Etafilcon A |
Omafilcon A |
| Proprietary name |
Acuvue®2 |
Proclear® |
| Manufacturer |
Johnson & Johnson |
CooperVision |
| Power (D) |
−3.00 |
−3.00 |
| Base Curve (mm) |
8.7 |
8.6 |
| Diameter (mm) |
14.0 |
14.2 |
| Monomers |
HEMA, MA |
HEMA, PhC |
| Surface Modification |
None |
None |
| Oxygen Transmissibility (×10−9) |
31.0 |
52.3 |
| Water Content |
58% |
62% |
| FDA class | Group IV | Group II |
USAN: United States adopted name; HEMA (poly-2-hydroxyethyl methacrylate); MA (methacrylic acid); PhC (phosphorylcholine).