PureVision

PureVisionPureVision contact lenses are monthly disposable lenses designed by Bausch and Lomb to be discarded after a month of wear.  Select patients will be able to wear PureVision disposable lenses continuously for up to a month, depending on advice from their eye care practitioner.  PureVision lenses are made using an optical design to correct spherical abnormality to give you optimum vision.  To assist you in locating your lenses in the solution, PureVision contacts are made with a light blue tint.



Lens Material

The lens material, balafilcon A, is a copolymer of a silicone vinyl carbamate, N-vinyl-pyrrolidone, a siloxane crosslinker and a vinyl alanine wetting monomer, and is 36% water by weight when immersed in a sterile borate buffered saline solution.

 

Lens Parameters
Chord Diameter: 14.0mm
Center Thickness: 0.09 mm at-3.00D
Base Curves: 8.6mm
Power: -10.00D to +6.00D, in 0.50D steps
-6.50D to -10.00
Approved Power Range: -25.00D to +25.00D
Lens Properties
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[cm3O2(STP) x cm]/(sec x cm2 x mmHg) @ 35 degrees C Polarographic Method (Boundary and Edge Corrected)
101 x 10-11[cm3O2(STP) x cm]/(sec x cm2 x mmHg) @ 35 degrees C Polarographic Method (Boundary Corrected, Non-Edge Corrected)

Leave a Reply

Your email address will not be published. Required fields are marked *