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

Optical Low Coherence Reflectometry (OLCR) versus Ultrasound Pachymetry (US): Comparison of Precision in 120 human Eyes

Lackerbauer C.-A., Kojetinsky C., Grueterich M., Kampik A., Ludwig K.
Department of Ophthalmolgy, Ludwig-Maximilians-University, Munich

Purpose: To investigate the precision of corneal pachymetry, an important focus in Excimerlaser refractive surgery. A new "non-contact" method based on OLCR could have beneficial effects compared to standard US-pachymetry.
Method: Corneal thickness was measured in 120 eyes (60 volunteers) with an OLCR prototype, integrated in the Allegretto-Excimerlaser system, Wavelight Laser Technologies AG, Erlangen, Germany, and with an US-pachymetry system SP 2000, Tomey, Erlangen, Germany. Measurements were performed by one investigator, each consisting of 10 consecutive scans. Results were considered statistically (paired t-test, p<0.05). In addition, corneal thickness measurements of both methods were proven by two independent investigators in further 20 cases. Results were correlated (spearman rank correlation; rho).
Results: Corneal thickness could be measured with OLCR in 115 cases., while US-pachymetry could be performed in all human eyes without problems. Mean corneal thickness was 541.3 µm±31.7 µm (range 414.6 µm-608.5 µm) with OLCR, respective standard error of the single scans 1.5 µm. With US-pachymetry mean corneal thickness was 533.1µm±31.8 µm (range 410.2 µm-599.1 µm), respective standard error of the single scans 3.3 µm (p<0.0001). Interreader-correlation was high for both methods (OLCRrho:0.962; USrho:


Zurück | Back