Toric Contact Lenses for Astigmatism: How to Choose
Share
Astigmatism occurs when the eye does not focus light equally in every direction. A toric contact lens is designed to correct this difference and uses CYL and AXIS in addition to SPH.
How does a toric lens work?
A toric design has different optical powers in different meridians. Its stabilisation system helps it remain correctly oriented, making fit and axis accuracy important.
Reading the prescription
- SPH — main minus or plus power;
- CYL — cylindrical correction;
- AXIS — cylinder direction from 1° to 180°;
- BC and DIA — fit-related parameters.
Manufacturers do not offer every possible CYL/AXIS combination, and eyeglass values should not be rounded without an appropriate contact-lens fitting.
Toric options at OpticOn
- ACUVUE OASYS 1-Day for Astigmatism — daily;
- ACUVUE OASYS for Astigmatism — two-week;
- Biofinity Toric — monthly;
- Air Optix plus HydraGlyde for Astigmatism — monthly.
Why can vision fluctuate?
If a lens rotates, the correction axis changes and vision may blur temporarily. Fit, dryness, lens condition or mismatched parameters can contribute.
Ordering
Toric combinations are often supplied to order. Verify SPH, CYL and AXIS for both eyes, box quantities and estimated delivery.
Spherical alternatives
For prescriptions without astigmatism, options include Biofinity, Biofinity XR and ZEISS Contact Day 30 Compatic to −20.00 D.
Conclusion
Successful toric selection depends on CYL, AXIS and stable fit—not power alone. See the care guide for daily handling.
Spherical and toric lenses
A spherical lens uses one main optical power, while a toric lens provides different correction by direction. Even small rotation can affect vision, so spherical and toric products with the same SPH are not interchangeable.
Why are AXIS values often in tens?
Many ready-made toric ranges offer AXIS in set steps, often ten-degree intervals, although availability varies by product. A glasses value such as 165° should not be rounded to 160° or 170° without an appropriate fitting.
CYL availability
Toric cylinders come in fixed series and do not reproduce every eyeglass value. Selecting the merely “closest” number is not enough; the final contact-lens parameters may require separate assessment.
Can one eye use a toric lens and the other a spherical lens?
Yes, when astigmatic correction is needed in only one eye, different lens types or models may be used. Track box quantities, schedules and replacement dates separately.
Frequently asked questions
Is a toric lens thicker?
Its design differs from a spherical lens, but wearing sensation depends on the specific model and fit.
Why are toric lenses often special order?
SPH, CYL and AXIS create many combinations, making it impractical to keep every parameter permanently in stock.
