Contact Lens, Tear Film Thickness
Conditions
Brief summary
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.
Interventions
DEVICEOptical Coherence Tomography
Sponsors
Medical University of Vienna
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Pre lens and post lens tear film thickness | 2 months |
Countries
Austria
Contacts
Primary ContactGerhard Garhöfer, Assoc. Prof. PD Dr.
Outcome results
None listed