The impact of astigmatism on near visual acuity and reading ability in pseudophakic patients

Recruiting

• Conditions: h25; Q12.0; Presence of intraocular lens; H26; Z96.1; Senile cataract; Other cataract; Congenital cataract

• Registration Number: DRKS00003491
• Lead Sponsor: Klinikum der Wolfgang Goethe-Universität

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Start: 2012-05-23
• Last Update Posted: 19 August 2024

Recruitment & Eligibility

• Status: Recruiting
• Sex: All
• Target Recruitment: 25

Inclusion Criteria

the subjects´ age: between 50 and 70 years

- pseudophakia

- Monofocal aspheric IOL

- Corneal astigmatism = 0.75 (rectus and inversus only)

Exclusion Criteria

- Dyslexia or illiteracy

- complications during cataract surgery, which effects the postoperative visual acuity

- Diseases that have an influence on vision

- astigmatism> 0.75dpt

- Spherical refractive error of 2dpt

- Opacity of the refractive media

Study & Design

• Study Type: observational
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
There will be ??unique measurements of the near visual acuity and visus using the Freiburg Acuity and Contrast Test (FRACT), shown on the Salzburg Reading Desk (SRD). As a test mark the Radner Reading Charts, Landolt rings, as well as the tumbling E charts are used. The long distance visual acuity is examined via Frankfurt Freiburg Contrast and Acuity Test System (FF-CATS).

Secondary Outcome Measures

Name	Time	Method
single measurement of<br>- The pupil diameter (Procyon ® P3000)<br>- The subjective and objective refraction (iTrace)<br>- The reading speed and reading distance (Salzburg Reading Desk)<br>- The corneal topography (iTrace)