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Lens Material Recommendations:

The strength or your prescription is what determines lens material selection.
Following are recommendations on which material you should select for your prescription.

     
The first number or column on your prescription is the sphere power.
The second number or column on your prescription is the cylinder power.
Cylinder powers above + or - 1.00 could affect lens material recommendations.
Single Vision prescriptions with a cylinder power above + or - 2.00 may require an extended range lens.
Check prescription range availability for the lens desired before submitting your order.
CR-39 Plastic Lenses
Sphere power below + or - 1.00
Cylinder power below + or - 1.00
Polycarbonate Lenses
Sphere power below + or - 3.00
Cylinder power below + or - 2.00
Trivex Lenses
Sphere power below + or - 3.00
Cylinder power below + or - 2.00
     
Material Index 1.56 or 1.60
Sphere power below + or - 3.00
Cylinder power below + or - 2.00
High Index 1.67
Sphere power below + or - 6.00
Cylinder power below + or - 4.00
High Index 1.74
Sphere power + or - 8.00 or above
Cylinder power below + or - 6.00