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Prescription Help

Need assistance with your prescription? Don’t worry we can help! Please view the answers to these FAQ's:

What is O.S/O.D?

O.S = left eye
O.D= right eye

Are bi or multifocal lenses offered in colors?

No

What is the base curve, diameter, power, add power, axis, and cylinder? What does this all mean?

B.C (base curve): is the measurement of the back curve of the contact lens. Usually signified by a number ranging between 8.0-10.0.

  • Diameter: refers to the width of the contact lens usually a number between 13.0-15.0.
  • Power: is the strength or amount of correction needed, ranges from -20.0 to +20.0.
  • Axis: a number from 0-180 ONLY FOR ASTIGMATISIM & TORIC LENSES.
  • Cylinder (cyl): ranges from -0.75 to -10.0 ONLY FOR ASTIGMATISIM & TORIC LENSES.
  • Add Power: an additional correction for bifocal lenses, ranges from +1.00-+3.00.

Was your question answered? If not, please do not hesitate to give us a call at 1-(917)-421-9874 or via email at sales@shopcle.com.

If this is a medical emergency please contact your local physician for immediate help.