A Comprehensive Guide to Understanding Your Prescription for Vision Specialists

Ordering prescription lenses from Vision Specialists requires submitting your prescription (Rx), but understanding all the numbers and abbreviations can be daunting. Here’s a helpful guide to input your Rx correctly and get clearer vision quickly

OD and OS:

  • OD: Stands for “oculus dextrus,” which is Latin for your right eye.
  • OS: Stands for “oculus sinister,” Latin for your left eye.

Understanding Your Prescription:

  • Sphere (SPH): Indicates the lens power to correct nearsightedness (-) or farsightedness (+).
  • Cylinder (CYL): Indicates the lens power for astigmatism. A minus sign (-) indicates nearsighted astigmatism, and a plus sign (+) indicates farsighted astigmatism.
  • Axis: Specifies the location of the sphere and cylinder powers on the lens, ranging from 1 to 180.
  • PD (Pupillary Distance): The distance between your pupils.
  • Add: Additional reading lens power for progressive lenses.
  • Prism Correction: For correcting exotropia or esotropia, an additional $10/eye applies.

Key Points to Validate Your Prescription:

  • If there is a CYLINDER, there must be an AXIS.
  • If there is an AXIS, there must be a CYLINDER.
  • CYLINDER values must both be positive or both negative.
  • “SPH” or “SPHERE” in your CYLINDER means it corrects only sphere, not the same value.
  • For progressive or bifocal lenses, your prescription must include an ADD value.
  • Converting Rx from progressive to single vision for reading involves adding the ADD value to the SPH.
    • Example: SPH +4.00 and ADD +2.00 becomes new SPH +6.00.
  • For single vision distance lenses, ignore the ADD values and use the rest of the Rx normally.

Understanding these aspects ensures your prescription is correctly inputted for ordering lenses from Vision Specialists. Clear vision is just a step away with our simplified guide!

For more information or assistance with your prescription, contact Vision Specialists dedicated team of eyewear experts today. We’re here to help you see clearly and comfortably with our convenient online service.

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