Which statement best reflects the commonly used approach in bitoric GP fitting today?

Which statement best reflects the commonly used approach in bitoric GP fitting today?

• A. Saddle fit
• B. Low toric simulation
• C. High toric simulation
• D. Hybrid toric

Answer: (B)

Fitting bitoric gas-permeable lenses focuses on correcting astigmatism while keeping the lens stable, comfortable, and easy to fit. The approach commonly used today is low toric simulation on the posterior surface. Keeping the toricity modest allows the lens to align reliably with the eye’s meridians without requiring large curvature differences that can lead to binding, rotation instability, or difficult tear dynamics. The tear layer and peripheral design still contribute to correcting residual astigmatism, so you get good vision with a fit that’s easier to achieve and wear. In contrast, high toric simulation imposes bigger curvature differences, making the fit more sensitive to rotation and movement and increasing the risk of decentration or discomfort. Saddle-fit describes an older concept about how a lens interacts with a saddle-shaped surface and isn’t the standard approach in current practice, while hybrid toric is a less universally adopted alternative.

Fitting bitoric gas-permeable lenses focuses on correcting astigmatism while keeping the lens stable, comfortable, and easy to fit. The approach commonly used today is low toric simulation on the posterior surface. Keeping the toricity modest allows the lens to align reliably with the eye’s meridians without requiring large curvature differences that can lead to binding, rotation instability, or difficult tear dynamics. The tear layer and peripheral design still contribute to correcting residual astigmatism, so you get good vision with a fit that’s easier to achieve and wear. In contrast, high toric simulation imposes bigger curvature differences, making the fit more sensitive to rotation and movement and increasing the risk of decentration or discomfort. Saddle-fit describes an older concept about how a lens interacts with a saddle-shaped surface and isn’t the standard approach in current practice, while hybrid toric is a less universally adopted alternative.