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How to read my prescription

OD vs. OS Eye

OD is short for the Latin term oculus dexter which means right eye.
OS is an abbreviation of the Latin oculus sinister which means left eye. You'll often see this terms on eyeglass prescriptions.

Sphere, cylinder, and Axis on Eye prescriptions

Sphere:The sphere (SPH) on our prescription indicates the lens power you ne. to see clearly. A minus (-) symbol next to this number means you're earsighted, and a plus (4-) symbol means the prescription is meant to correct farsightedness.
Cylinder:The cylinder (CYL) number indicates the lens power needed to correct astigmatism. If this column is blank, it means you don't have an astigmatism.
Axis: An axis number will also be included if you have an astigmatism. This number shows the angle of the lens that shouldn't feature a cylinder power to correct your astigmatism.

A nearsighted prescription will feature a number with a minus (-) symbol in the 'sphere' box. This means your lenses will be shaped to improve your distance vision.

Tap on the prescription form to find out what all those number and abbreviations mean.

Patient _________

Expiration date _________

Sphere Cylinder Axis Prism Base
Distance OD -4.00 ____ ____ ____ ____
OS -5.00 -0.50 180 ____ ____
ADD OD ____ ____ ____ ____ ____
OS ____ ____ ____ ____ ____
Sphere Cylinder
Distance OD -4.00 ____
OS -5.00 -0.50
ADD OD ____ ____
OS ____ ____
Axis Prism
____ ____
180 ____
____ ____
____ ____
Base
____
____
____
____
Pupilary distance (PD):60

A prescription for someone who is farsighted will feature a number with a plus (+) symbol in the ‘sphere’ box. This indicates that your lens should be shaped to correct near vision.

Tap on the prescription form to find out what all those number and abbreviations mean.

Patient _________

Expiration Date _________

Sphere Cylinder Axis Prism Base
Distance OD +4.00 ____ ____ ____ ____
OS +4.00 -0.50 180 ____ ____
ADD OD ____ ____ ____ ____ ____
OS ____ ____ ____ ____ ____
Sphere Cylinder
Distance OD +4.00 ____
OS +4.00 -0.50
ADD OD ____ ____
OS ____ ____
Axis Prism
____ ____
180 ____
____ ____
____ ____
Base
____
____
____
____
Pupilary distance (PD):60

If you have an astigmatism, you will have a number in the ‘cylinder’ column of your prescription that indicates the lens power needed to correct the astigmatism. There will also be a number in the ‘axis’ column that’s needed for astigmatism correction.

Tap on the prescription form to find out what all those number and abbreviations mean.

Patient _________

Expiration date _________

Sphere Cylinder Axis Prism Base
Distance OD -4.00 ____ ____ ____ ____
OS -4.00 -0.50 180 ____ ____
Add OD ____ ____ ____ ____ ____
OS ____ ____ ____ ____ ____
Sphere Cylinder
Distance OD -4.00 ____
OS -4.00 -0.50
Add OD ____ ____
OS ____ ____
Axis Prism
____ ____
180 ____
____ ____
____ ____
Base
____
____
____
____
Pupilary distance (PD):60

A multifocal prescription will include an ADD value, sometimes marked as NV. This indicates the required strength for the near prescription in your lens.

Tap on the prescription form to find out what all those number and abbreviations mean.

Patient _________

Expiration _________

Sphere Cylinder Axis Prism Base
Distance OD -4.00 ____ ____ ____ ____
OS -5.00 -0.50 180 ____ ____
ADD OD +2.00 ____ ____ ____ ____
OS +2.00 ____ ____ ____ ____
Sphere Cylinder
Distance OD -4.00 ____
OS -5.00 -0.50
ADD OD +2.00 ____
OS +2.00 ____
Axis Prism
____ ____
180 ____
____ ____
____ ____
Base
____
____
____
____
Pupilary distance (PD):60

A prescription for correcting eye allignment issues will include a PRISM and BASE value. These are needed to tell us how to shape the lens so that it can accurately align the wearer’s eyesight. The base value will show either “in” or “out”, or “up” and “down”, indicating the direction the prism should be angled.

Tap on the prescription form to find out what all those number and abbreviations mean.

Patient _________

Expiration _________

Sphere Cylinder Axis Prism Base
Distance OD -5.00 ____ ____ ____ Up
OS -5.00 -0.50 180 ____ Down
ADD OD ____ ____ ____ ____ ____
OS ____ ____ ____ ____ ____
Sphere Cylinder
Distance OD -5.00 ____
OS -5.00 -0.50
ADD OD ____ ____
OS ____ ____
Axis Prism
____ ____
180 ____
____ ____
____ ____
Base
Up
Down
____
____
Pupilary distance (PD):60
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