Toric contact lenses are designed to correct astigmatism by incorporating different powers in different meridians of the lens. They must maintain a stable orientation on the eye to work effectively.
Design Features
Stabilisation methods such as thin‑zone or prism ballast help the lens rotate into the correct position after each blink. Markings on the lens allow practitioners to assess alignment and make adjustments.
- Available as soft, rigid, and some hybrid designs
- Come in daily, planned replacement, and extended‑wear options
- Fitting may take longer than for simple spherical lenses
- Comfort is similar to non‑toric lenses when properly fitted
Clinical Use
Toric lenses provide clearer, more stable vision for people with significant astigmatism compared with spherical lenses alone. Regular reviews ensure that the fit and orientation remain satisfactory.
- Report any fluctuating or blurred vision that might indicate rotation issues
- Fine‑tuning of axis and power may be needed after initial trials
- Suitable lens care and replacement schedules follow general soft or rigid lens principles
- Back‑up spectacles should still incorporate full astigmatic correction
