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

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