Rotational Stability of Two Soft Toric Contact Lens Designs

Summary

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.

Conditions

• Astigmatism

Interventions

DEVICE

Acuvue Oasys for Astigmatism

Commercially available soft toric contact lens composed of senofilcon A, with an 8.6-mm base curve and 14.5-mm diameter, using an accelerated stabilization design.

DEVICE

Air Optix for Astigmatism

Commercially available soft toric contact lens composed of lotrafilcon B, with an 8.7-mm base curve and 14.5-mm diameter, using a modified periballast stabilization design.

Sponsors & Collaborators

• Bozok University

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

OTHER

Masking

NONE

Model

CROSSOVER

Eligibility

Min Age

18 Years

Max Age

50 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2026-05-02

Primary Completion

2026-07-01

Completion

2026-07-01

Countries

• Turkey (Türkiye)

Study Locations