Comparison between six different cornea topography measurement instruments.
Completed
- Conditions
- cataractpearl eye10047518
- Registration Number
- NL-OMON34898
- Lead Sponsor
- niversitair Medisch Centrum Groningen
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Completed
- Sex
- Not specified
- Target Recruitment
- 30
Inclusion Criteria
Subjects without any history of corneal eye diseases are included in this study.
Exclusion Criteria
Subjects that have worn contact lenses for the past two years are excluded from this study. Furthermore subjects that had refractive surgery in the past are also excluded.
Study & Design
- Study Type
- Observational non invasive
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method <p>The primary parameters are the coefficients of the main Zernike-polynomials for<br /><br>coma-like aberrations C(3/-1) and C(3/1). These represent the objective results<br /><br>of the different cornea topography measurement instruments. </p><br>
- Secondary Outcome Measures
Name Time Method <p>Besides comparing the objective results of the instruments, it is also<br /><br>important to study the clinical user friendliness of the instruments. Therefore<br /><br>the time of total measurement of each instrument with each patient will be<br /><br>measured. Furthermore will the operator and the subject judge each instrument<br /><br>using grades from 1 to 10, where 1 is worst and 10 is best, on comfort and<br /><br>patient friendliness.</p><br>