Improvement of reading ability in presbyopic patients by using aspheric multifocal LASIK

Not Applicable

• Conditions: H52.4; Presbyopia

• Registration Number: DRKS00003422
• Lead Sponsor: Augenklinik der Johann Wolfgang Goethe-Universität

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Start: 2012-01-25
• Last Update Posted: 19 August 2024

Recruitment & Eligibility

• Status: Pending
• Sex: All
• Target Recruitment: 35

Inclusion Criteria

Presbyopia
- Myopia or hyperopia up to 5D (spherical equivalent)
- Astigmatism up to 3D
- pupil (measured with Procyon): high mesopic: 2,5 - 3mm, low mesopic: = 4,5mm
- Offset (pupil vs. vertex measured with Keratron Scout): < 0,7mm
- Keratometry: 40-48D mesaured with Scout
- CDVA = 0,1 LogMAR
- DCNVA = 0,4 logRAD
- CNVA = 0,2 LogRAD (add: = +1,5dpt)
- Corneal spherical aberration (C4,0 @ 6mm) measured with Keratron Scout: >0
- Ocular spherical aberration (C4,0 @ 6mm) measured with iTrace: > -0,2
- Ocular HOA RMS (@ 6mm) measured with iTrace: <0,67

Exclusion Criteria

Occupational groups, dependent on good visual acuity, who might be hindered in career du to possible visual complications (e.g. motorists, pilots).

Study & Design

• Study Type: interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Comparison of preoperative and one year postoperative uncorrected and distance corrected near visual acuity (logRAD). Near visual acuity is tested using Salzburg Reading Desk (SRD).

Secondary Outcome Measures

Name	Time	Method
Following tests are conducted 1 month, 3 month, 6 month and 1 year postoperatively: <br>- reading ability (logRAD) is tested using Salzburg Reading Desk (SRD).<br>- refractive error<br>- visual acuity at distance, intermediate and near<br>- contrast sensitivity (FF-Cats)<br>- glare sensitivity (FF-CATS)<br>- ocular and corneal aberrations (i-Trace)<br>- corneal topography (Pentacam)<br>- subjective optical quality (questionaire)