Combine two spherocylindrical lenses with different axes into one resulting sphere, cylinder and axis. Enter the Rx for both lenses.
When two cylinders share an axis, you can simply add them. When their axes differ, they interact and produce a new sphere, cylinder and axis. This calculator does that math for you.
Common uses:
- Combining a spectacle Rx with a toric contact lens or corneal toricity
- Stacking a trial lens over an existing Rx
- Predicting the effect of a rotated or misaligned toric lens
Enter the sphere, cylinder and axis for Lens 1 and Lens 2, and you'll get the single resultant Rx that equals the two lenses combined. To find the power of one lens at a single angle instead, use the Oblique Meridian Calculator.
