High-resolution Imaging of Tear Film Thickness in Contact Lenses Wearers With Optical Coherence Tomography (OCT). A Pilot Study

Medical University of Vienna

Status: Unknown

Conditions: Contact Lens; Tear Film Thickness

Treatments: Device: Optical Coherence Tomography

Study type: Observational

Funder types: Other

Identifiers

NCT02713399

OPHT-150116

Details and patient eligibility

About

A refractive error is the most common reason for reduced visual acuity. Myopia, hyperopia, astigmatism and presbyopia belong to the four basic refractive errors and, unfortunately, cannot be prevented. There are different tools to correct them, like spectacles, contact lenses, and refractive surgery. Many different contact lenses are available, the two large groups create rigid contact lenses and soft contact lenses. It is a common knowledge that the presence of a contact lens in the eye divides the tear film into the prelens and postlens tear film layers. In the present study we want to investigate the variability and reproducibility of prelens and postlens tear film thickness measurements.

Enrollment: 30 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion and exclusion criteria

Inclusion criteria

• Men and women aged over 18 years
• Soft or rigid contact lenses wearers
• Schirmer Test ≥ 10 mm/5 min
• Tear Breakup Time (TBUT) ≥10 seconds

Exclusion Criteria:

• Participation in a clinical trial in the previous 3 weeks
• Presence of any abnormalities preventing reliable measurements as judged by the investigator
• Pregnancy, planned pregnancy or lactating

Trial design

30 participants in 2 patient groups

Soft Contact Lenses

Description:

healthy subjects wearing soft contact lenses

Treatment:

Device: Optical Coherence Tomography

Rigid Contact Lenses

Description:

healthy subjects wearing rigid contact lenses

Treatment:

Device: Optical Coherence Tomography