CIBA Vision’s Focus 1-2 Week Visitint contact lenses are designed to be worn as daily lenses for up to two weeks and discarded.  Because Focus 1-2 Week Visitint disposable contact lenses are routinely replaced with fresh lenses, your eyes are kept from being irritated by deposits building up.  For ease of use, Focus 1-2 Week Visitint lenses are manufactured with a light blue tint to assist you in locating your lenses in the solution.     

Lens Material
The lens material is 55% water and 45% vifilcon A, a hydrophilic co-polymer of 2-hydroxyethyl methacrylate and povidone, USP. The chemical name is poly (2-hydroxyethyl methacrylate-co-ethylene dimethacrylate co-methacrylic acid-g-povidone). 

Lens Parameters
Base Curve: 8.4mm and 8.8mm
Diameter: 14.0mm
Power Range: -6.50D to -10.00D (0.50D steps)
Center Thickness: 0.06 mm at all minus powers
  0.12 mm at +3.00D (varies with power)


Lens Properties  
Specific Gravity: 1.12
Refractive Index (hydrated): 1.415
Light Transmittance: 93%
Water Content: 55% by weight in normal saline
Oxygen Permeability: 16.0 x 10-11 (cm2/sec)(ml 02/ml x mm Hg), measured at 23 degrees C (Fatt method)

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