Which of the following can be employed to limit rotation in soft toric lenses?

In the context of soft toric lenses, limiting rotation is crucial for maintaining the optical performance of the lens, as these lenses are designed to correct astigmatism, and any rotation can lead to misalignment between the lens and the patient's cornea.

Double slab-off thin zones effectively address this issue by creating specific geometric alterations in the lens design. These thin zones help stabilize the lens by enhancing centration and providing a more consistent orientation on the eye. The design helps distribute the weight more evenly, minimizing any tendency of the lens to rotate during eye movement. This stabilization is essential because even small degrees of rotation can lead to significant visual disturbances in users who rely on astigmatic corrections.

Other options, while potentially having their own merits in lens design, do not focus specifically on reducing lens rotation in the way that double slab-off thin zones do. For instance, anterior toricity and peripheral curve design may improve fit and comfort but are not primarily intended to limit lens rotation effectively. Friction from surface markings may introduce additional complications rather than serve as a reliable means of stabilization.

Thus, employing double slab-off thin zones is a more targeted approach to limiting rotation in soft toric lenses, ensuring better visual outcomes for patients.