How to Read Your Contact Lens Prescription
Definitions
Brand
the name of your contact lenses
OD
your right eye
OS
your left eye
Power (PWR)
the strength of your contact lens
Base Curve (BC)
the inside curve of your lenses
Diameter (DIA)
the size of your contact lenses
(Astigmatism Only)
Cylinder (CYL)
the strength of your astigmatism
Axis
the orientation of your astigmatism
The material provided on this site is for informational purposes only.
It is not meant as a substitute for the advice provided to you by your eye care or other medical professional.
You should have your eyes examined regularly and always follow the instructions for the proper use and care
of your contact lenses given to you by your eye care professional. You should read all product packaging and
instructions carefully, and only use the product according to those instructions.
If you experience any pain or discomfort in your eyes while you are wearing your contact lenses,
discontinue use immediately and consult your eye care professional.
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