Table 5. Silicone hydrogel contact lens material characteristics.
| Material Type | Silicone Hydrogel | ||
|---|---|---|---|
| USAN |
Senofilcon A |
Comfilcon A |
Balafilcon A |
| Proprietary name |
Acuvue® OASYS™ |
Biofinity® |
PureVision™ |
| Manufacturer |
Johnson & Johnson |
CooperVision |
Bausch & Lomb |
| Power (D) |
−3.00 |
−3.00 |
−3.00 |
| Base curve (mm) |
8.4 |
8.6 |
8.6 |
| Diameter (mm) |
14.0 |
14.0 |
14.0 |
| Centre thickness (mm) −3.00D |
0.07 |
0.08 |
0.09 |
| Monomers |
mPDMS, DMA, HEMA, siloxane macromer, EGDMA, PVP |
M3U, FM0411M, HOB, IBM, NVP, TAIC, VMA |
NVP, TPVC, NVA, PBVC |
| Surface modification |
PVP as an internal wetting agent |
None |
Plasma oxidation |
| Oxygen transmissibility (×10−9) |
147 |
160 |
110 |
| Modulus (MPa) |
0.7 |
0.75 |
1.1 |
| Water content |
38% |
48% |
36% |
| FDA class | Group I | Group I | Group III |
USAN: United States adopted name; DMA (N,N-dimethylacrylamide); EGDMA (ethyleneglycol dimethacrylate); FM0411M (2-ethyl [2-[(2-methylprop-2-enoyl)oxy]ethyl]carbamate); HEMA (poly-2-hydroxyethyl methacrylate); HOB ((2RS)-2-hydroxybutyl 2-methylprop-2-enoate); IBM (Isobornyl methacrylate); M3U (α-[[3-(2-[[2-(methacryloyloxy)ethyl] carbamoyloxy]ethoxy)propyl]dimethylsilyl]-ω-[3-(2-[[2-(methacryloyloxy)ethyl] carbamoyloxy]ethoxy)propyl]poly([oxy[(methyl) [3-[ω-methylpoly(oxyethylene)oxy]propyl]silylene] /[oxy[(methyl)(3,3,3-trifluoropropyl)]silylene]/oxy (dimethylsilylene)])); mPDMS (monofunctional polydimethylsiloxane); NVA N-vinyl aminobutyric acid; NVP (N-vinyl pyrrolidone); PBVC (poly[dimethysiloxy] di [silylbutanol] bis[vinyl carbamate]); PVP (poly(vinylpyrrolidone)); TAIC (1,3,5-triprop-2-enyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione); TPVC (tris-(trimethylsiloxysilyl) propylvinyl carbamate); VMA (N-Vinyl-N-methylacetamide).