How to Read Your Eyeglasses Prescription

How to Read Your Eyeglasses Prescription ?

When ordering from us, you must have a valid eyeglasses prescription from your eye doctor. Here are some helpful tips for how to read your prescription. Keep in mind, not all prescriptions will have these fields filled out.

Eyeglasses Prescription Example

Eyeglasses Rx Terms

Abbreviation    Term Meaning Parameter Examples
OD Right Eye Right eye parameters
OS Left Eye Left eye parameters
SPH or PWR Sphere or Power Measure of near or far sightedness -12.00 to +6.00
CYL Cylinder Measure for astigmatism -3.75 to +3.75
X Axis Direction of cylindrical lens 0° to 180°
ADD Add Power Additional plus power for near sightedness. Used for progressive and bifocal prescriptions. 1 to 4, or HIGH, MED, LOW
PRISM/BASE Optical Prism Measure to compensate for eye alignment problems 0.5 base up (BU)
PD Pupillary Distance Measure of distance between pupils Adults: 58mm to 70mm, Children: 41mm to 58mm

Tags: How do I enter my prescription, reading prescription, read my prescription, perscription, my prescription

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