Cooper Clear DW contact lenses from CooperVision are spherical lenses designed to be worn as daily wear contacts, removed and cleaned nightly. These lenses are manufactured to last up to a year.
Lens Material
The lens material, tetrafilcon A, is a hydrophilic random terpolymer of 2-hydroxyethyl methacrylate, N-vinyl-2-pyrrolidone and methylmethacrylate joined in a three dimensional network of terpolymer chains by divinylbenzene cross links.
| Lens Parameters | |
| Base Curve: | 8.3, 8.6 and 8.7 mm |
| Diameter: | 14.0 and 14.4 mm |
| Power Range: | +6.00 to -6.50 (0.25 steps) |
| -6.50 to -10.00 (0.50 steps) | |
| Center Thickness: | 0.03 to 0.28mm (varies with power) |
Lens Properties | |
| Refractive Index: | 1.43 |
| Light Transmittance: | 97% |
| Surface Character: | Hydrophilic |
| Water Content: | 42.5% |
| Oxygen Permeability: | 9.3 x 10-11 (cm2/sec) (ml 02/ml x mmHg) at 35 deg. C |