Preference Toric XR

Preference Toric XRPreference Toric XR contact lenses from CooperVision are designed to correct the vision of patients suffering from astigmatism.  The “XR” stands for extended range, giving you a much wider range of prescription choices than the standard Preference Toric lens.  Preference Toric XR lenses are made with a visible tint to assist you in finding your lenses in the solution.
Lens Material
The lens material, tetrafilcon A, is a hydrophilic random terpolymer of 2-hydroxyethyl methacrylate, N-vinyl-2-pyrrolidone and methylmethacrylate joined in a three dimensional network of terpolymer chains by divinylbenzene cross-links.

 

Lens Parameters
Base Curve: 8.0 to 9.5mm
Diameter: 14.0 to 15.0mm
Sphere Power: -20.00 to +20.00D
Cylinder Powers: plano to -12.00D
Center Thickness: 0.07 to 0.78mm

 

Lens Properties
Refractive Index: 1.43
Surface Character: Hydrophilic
Water Content: 42.5%

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