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.

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Key information

Conditions

Astigmatism Eye Diseases Refractive Errors

Age range

18 year–50 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Yozgat Bozok University Research and Application Hospital

Yozgat, 66100, Turkey (Türkiye)

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Acuvue Oasys for Astigmatism

Device

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.

Air Optix for Astigmatism

Device

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.

Primary outcomes

Overall Mean Absolute Contact Lens Rotation

Time frame: 30 minutes after lens insertion during each fitting session

Absolute lens rotation was measured in degrees using slit-lamp biomicroscopy in five gaze positions (primary, right, left, upward, and downward gaze). For each lens design, the overall mean absolute rotation was calculated as the average of the absolute rotation measurements across the five gaze positions.

Sponsors and collaborators

Lead sponsor

Bozok University

Other

Registry information

Official study title

Comparison of Rotational Behavior of Soft Toric Contact Lenses With Different Stabilization Designs and Their Association With Ocular Biometric Parameters

Important dates

Study start: 2026
Primary completion: 2026
Study completion: 2026
First posted: Aug 31, 2026
Registry last updated: Aug 31, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed