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How to Understand contact lens prescription?

Answer:
The numbers on your prescription will correspond to the following:

- Dia - Diameter
- OS - Left Eye
- OD - Right Eye
- BC - Base Curve
- OU - Both Eyes
- Axis - (Toric lenses only)
- Cyl - Cylinder (Toric lenses only)
First answer by Seanbee. Last edit by Seanbee. Contributor trust: 2 [recommend contributor recommended]. Question popularity: 2 [recommend question].

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