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Terms found on a Prescription.

  • O.D.: This abbreviation refers to your RIGHT EYE.


  • O.S.: This abbreviation refers to your LEFT EYE.


  • Base Curve (BC): Refers to inside curve of your Contact Lens.
    • The values of BASE CURVE are typically 8.0, 8.1, 8.2, 8.3, 8.4 etc.

  • Diameter (Dia): Refers to the overall size of your Contact Lens.
    • The values of Diameter are typically 13.8, 14.0, 14.2, 14.4, 14.5 etc.

  • Power (Pow): Refers to the strength of your Contact Lens. Negative powers indicate NEARSIGHTEDNESS, while Plus powers indicate FAR SIGHTEDNESS.
    • The values of Power are typically -1.00, -1.25, +1.50, +3.00 etc.

  • Cylinder (Cyl): Refers to the strength of your astigmatism. This value is only seen in people with Astigmatism who require TORIC lenses.
    • The values of Cylinder are typically -0.75, -1.00, -1.25, -1.50, -1.75 etc.

  • Axis : Refers to the location of your astigmatism.. This value is only seen in people with Astigmatism who require TORIC lenses.
    • The values of Axis are typically 180, 170, 160, 090, 080 etc.

  • Plano : Refers to the strength of 0.00. This is the same as saying NO PRESCRIPTION.

  • Add : Refers to the strength of your reading prescription. This value is only seen in people with Presbyopia who require Bifocal lenses.
    • The values of Add are typically +1.00,1.25, +1.50, +1.75 etc.

  • Center Thickness (CT): Refers to the thickness of a contact lens as measured at the geometric center of the lens.
    • The values of CT are typically .10, .11, .12, .20, .25 etc.

  • 6 Pack: Refers to 6 lenses per box OF THE SAME PRESCRIPTION, BASE CURVE and DIAMETER etc..
  • D (Dipotre): Refers to the unit of measurement for lens power.


SAMPLE
contact lens prescription

Base Curve: 8.3   Diameter: 14.0   Power: -1.50



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