Programm                 "Degeneration und Regeneration– Grundlagen, Diagnostik und Therapie"


Hotelbuchung
   Hotel Registration
Grußwort
   Welcome address
Beteiligte Gesellschaften
   Societies involved
DOG Information
   DOG Information
Eröffnung des Kongresses
   Opening Ceremony
Preise
   Awards
Ablauf der Tagung 2003
   General overview of congress
Lageplan der Räumlichkeiten
   Map of Congress Center
Wissenschaftliche Themen
   Scientific topics
Symposien
   Symposia
Wissenschaftliches Programm
   Scientific program
Posterpräsentationen
   Poster Presentation
Kurse
   Courses
Begleitende Veranstaltungen
   Accompanying program
Arbeitssitzungen
   Working sessions
Rahmenprogramm
   Social program
Allgemeine Informationen
   General Information
Autorenindex
   Index of Authors
Industrieaussteller
   Commercial exhibitors
Sponsoren
   Sponsors
Impressum



DOG Homepage


Abstract
Abstract

Centerflex-Intraocular Lens: a New A-Constant for Optical Coherence Biometry

Lodzik E. M., Zaki N. V., Sekundo W. 
Eye Hospital, University of Marburg

Purpose: The Centerflex (Rayner Ltd/UK) is a new hydrophilic intraocular lens (IOL) with improved in-the-bag centration. In contrast to other intraocular lenses the Centerflex can be delivered in 0,25 D increments. The manufacturer’s A-constant for ultrasound biometry (A-mode scan) is 118.0. Vyas published a personalized A-constant of 117.8 (Vyas 2002) The aim of this study is to calculate the A-constant for the optical coherence biometry.
Method: Fourty eyes of 40 patients were implanted with Centerflex-IOL after routine phakoemulsification. Preoperative evaluation included the axial length, K-readings of the cornea and the anterior chamber depth. An objective and subjective refraction was done 8 weeks after cataract surgery and entered into the database of the IOL-Master. A new A-constant was calculated using IOL-Master TM integrated software.
Results: The optical coherence biometry A-constant for Centerflex calculated was 118.6.
Conclusions: We currently recommend an A-constant of 118.6 for Centerflex-IOL when optical coherence biometry is used for IOL calculation. A higher number of eyes examined might be needed to further increase the precision of the A-constant.


Zurück | Back