Rotational Stability of Two Soft Toric Contact Lens Designs

This study compared the rotational behavior of two commercially available soft toric contact lenses with different stabilization designs and explored whether ocular biometric and refractive characteristics were associated with lens rotation. Contact lens-naïve adults underwent baseline ocular biometry and were scheduled for two separate lens-fitting sessions in randomized order. Lens rotation was measured 30 minutes after insertion in primary, right, left, upward, and downward gaze using slit-lamp biomicroscopy. The study was designed as a two-period crossover comparison.

Inclusion Criteria: * Adults with astigmatic refractive error suitable for correction with the -commercially available toric contact lenses used in the study * No prior experience with contact lens wear * Healthy ocular surface examination * Ability and willingness to provide written informed consent Exclusion Criteria: * History of corneal pathology * Previous ocular surgery * Active ocular disease * Systemic disease affecting the eyes