Permalens contact lenses from CooperVision are spherical lenses designed to give you comfortable, clear vision.  The lenses are manufactured to be worn as daily lenses, although, some patients will be able to wear them for up to a week as extended wear lenses, depending on advice from their eye care practitioner.

   

Lens Material
The lens material, perfilcon A is terpolymer of 2-hydroxyethyl methacrylate, N-vinyl-2-pyrrolidone and methacrylic acid, with ethylene glycol dimethacrylate as the cross linking agent.

     

Lens Parameters
Diameter: 13.5, 14.0 and 14.2mm
Center Thickness: 0.10-0.40
Base Curves: 7.7, 8.0, 8.3 and 8.6mm
Powers: -20.00D to +8.00D

 

Lens Properties
Refractive Index: 1.38
Surface Character: Hydrophilic
Water Content: 71%
Oxygen Permeability: 42.0 x 10-11(cm2/sec) (ml 02/ml x mmHg) at 35 deg. C (The method of Irving Fatt, Ph.D.)
Light Transmittance: >96%

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