Effect of improved intraocular lenses on contrast sensitivity tests
Completed
- Conditions
- cataract10047518spherical aberration
- Registration Number
- NL-OMON29712
- Lead Sponsor
- Academisch Medisch Centrum
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Completed
- Sex
- Not specified
- Target Recruitment
- 60
Inclusion Criteria
- In both eyes cataract
Exclusion Criteria
- Cylindric correction larger than 1,5 D
- Macula degeneration if the visual acuity from one or both eyes is less than 0,8
- Glaucoma
- Diabetic retinopathy
- Medication that influences the tear function, pupil size or accomodation of the eye
- Pathology that influences the tear production
- Presence of pathology between the two cataract operations
- Younger than 18 years
- Presence of senile dementia (MMSE < 22)
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method <p>Main goal of this research is the comparison of the results of aspheric and<br /><br>spheric IOLs on contrast sensitivity and depth of focus.</p><br>
- Secondary Outcome Measures
Name Time Method <p>The variable rMTF (relative modulation transfer) can be calculated from the<br /><br>results of a contrast sensitivity test. rMTF is an indicator of the aberrations<br /><br>of the eye and can be defined as the ratio between de contrast sensitivity in<br /><br>defocus situations and in optimal focus as function of the spatial frequencies.<br /><br>Because of this, both the contrast sensitivity tests are performed in four<br /><br>different defocus situations.</p><br>