DESCRIPTION The Bausch + Lomb PureVision® 2 (balafilcon A) Visibility Tinted Contact Lens is a soft hydrophilic contact lens which is available as a spherical lens. The lens material, balafilcon A, is a copolymer of a silicone vinyl carbamate, N-vinylpyrrolidone, a siloxane crosslinker and a vinyl alanine wetting monomer, and is 36% water by weight when immersed in a sterile borate buffered saline solution. This lens is tinted blue with up to 300 ppm of Reactive Blue Dye 246.                                                                        

The physical / optical properties of the lens are: Specific Gravity: 1.064 Refractive Index: 1.426 Light Transmittance: C.I.E. value—at least 95% Water Content: 36% Oxygen Permeability: 91 x 10–11[cm3 O2 (STP) x cm]/(sec x cm2 x mmHg) @ 35° C Polarographic Method (Boundary and Edge Corrected) 101 x 10–11[cm3 O2 (STP) x cm]/(sec x cm2 x mmHg) @ 35°C Polarographic Method (Boundary Corrected, Non-Edge Corrected) The Bausch + Lomb PureVision®2 (balafilcon A) Visibility Tinted Contact Lenses, with AerGel™ technology lens material, are manufactured by the FormCast™ manufacturing process, cast molding process, and are surface treated by the Performa™ surface treatment process which transforms hydrophobic silicone to hydrophilic silicate. The Bausch + Lomb PureVision®2 (balafilcon A) Visibility Tinted Contact Lens may be prescribed for Frequent/Planned Replacement or Disposable Wear.

LENS PARAMETERS AVAILABLE The Bausch + Lomb PureVision®2 (balafilcon A) Visibility Tinted Contact Lens is a hemispherical shell of the following dimensions: Diameter: 14.0mm Center Thickness: Varies with Power 0.070mm at -3.00D Base Curve: 8.6mm Powers (Spherical): +6.00D to -12.00D*