High Index Lenses are designed for higher prescriptions.
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 – 2.00 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.
Recommended prescription range for High Index Lenses:
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
