Prescription
Use this contact lens Rx example and term definitions table to help solve the once confusing puzzle known as your prescription! Keep in mind, not all prescriptions will have these fields filled out.
Contact Lens Rx Terms
| Abbreviation | Term | Meaning | Parameter Examples |
| OD | Right Eye | Right eye paramaters | |
| OS | Left Eye | Left eye paramaters | |
| SPH or PWR | Sphere or Power | Measure of near or far sightedness | -20.00 to +20.00 |
| CYL | Cylinder | Measure for astigmatism | -4.00 to +4.00 |
| X | Axis | Direction of cylindrical lens | 0° to 180° |
| BC | Base Curve | Fitting of the contact lens | 8.0 to 10.00 |
| DIA | Diameter | Measure of the lens width | 13.0 to 15.0 |
