Guide To Read Your Prescription

Sometimes you don’t understand your prescription and might need help to understand it. With Eye Winsome prescription guide, you can read it easily. There are different formats of prescriptions followed based on the lens type.

Standard Grid Format

Standard Grid format is the most common format, having clear columns for OD, OS, SPH, CYL, and Axis. They can be filled by an ophthalmologist by hand or computerized printing.

Interpretation of Rx Notes

  • SPH- spheres will always have a (+) or (-) sign.
  • CYl- Cylinder will also have a (+) or (-) sign.
  • PD- pupillary distance can be written in different ways e.g. 61 (signal PD)  30/31 (Dual PD).

Progressive/Bifocal Format

Standard Grid format with some additional columns are used for bifocal and multi-focal lenses. ADD or D.V/N.V column will be included and its value will always have a (+) sign.

Interpretation of RX Notes

  • SPH, Cyl and Axis will have same indications.
  • DV – Distance vision or nearsightedness, will have a (-) sign
  • ADD/NV- Near  vision or reading, will have a (+) sign.

Standard Grid with Prism

An uncommon type of prescription is prism Rx. It refers to the amount of prismatic power. It is usually needed to compensate for eye alignment. With standard grid format, additional two columns are for prism and Base.

Interpretation of  Rx Note

  • Bo – Base out
  • Bi  – Base in
  • Bu – Base up
  • BD/BDn – Base Down

Vertical Prescription Format

It usually has all the same features as a standard grid but in vertical form, listed from top to bottom.

Blank Format

It has same information but without columns and grids, and is usually handwritten by doctor on a plain paper.

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