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.
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.
|Diameter:||13.5, 14.0 and 14.2mm|
|Base Curves:||7.7, 8.0, 8.3 and 8.6mm|
|Powers:||-20.00D to +8.00D|
|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.)|