Anmeldung zur Tagung
Registration
Grußwort
Invitation
Themen
Topics
Allgemeiner Ablauf
General overview
Wissenschaftliches Programm
Scientific program
Kurse
Courses
Symposien
Symposiums
Frühstück mit Spezialisten
Breakfast with specialists
Arzthelferinnen-Fortbildung
Rahmenprogramm
Social program
DOG Information
DOG Information
Allgemeine Informationen
General Information
Autorenindex
Index of Authors
Ausstellerliste
Exhibitors
Sponsoren
Sponsors
Teilnahmegebühren
Registration fees
Impressum
Comparison of a new partial coherence interferometry-method (Zeiss IOL-Master) for calculation of posterior chamber intraocular lenses with two ultrasonic biometry-techniques.
Remsch H., Kampmeier J., Lang G. E., Lang G. K.
University of Ulm, Department of Ophthalmology, Ulm, Germany
Objective: To investigate accuracy of prediction of three different
biometric methods for calculation of posterior chamber intraocular lenses.
Methods: In 63 consecutive patients who underwent extracapsular
cataract-extraction with posterior chamber intraocular lens implantation
the refractive results at the first day (REF1) and 6 weeks (REF2) after
the operation were compared with the calculated refraction of three biometric
methods: Karl Zeiss IOL-Master 99 (IOL), Biovision Echograph Class 1 -
Type B (BIO) and Allergan Humphrey Ultrasonic Biometer Mod 820 (HMP).
Analysis of variance was used for statistical calculation.
Results: All calculated refractive values (IOL = -0.39 ±
0.89 dpt ; BIO = - 0.72 ± 0.72 dpt ; HMP = -0.37 ± 0.96
dpt) were lower than the refraction at the first postoperative day (REF1
= -0.13 ± 1.49 dpt) and six weeks after surgery (REF2 = -0.13 ±
1.19 dpt). Performing analysis of variance the coefficient of determination
was calculated for the comparison between REF1 and IOL (R2 = 0.42), REF2
and IOL (R2 = 0.56), REF1 and BIO (R2 = 0.27), REF2 and BIO (R2 = 0.25),
REF1 and HMP (R2 = 0.23) and finally REF2 and HMP (R2 = 0.27).
Conclusion: Comparison between the three biometric methods and
the refractive results 1 day and 6 weeks after cataract surgery with implantation
of a posterior chamber intraocular lens shows that the mean values obtained
from the three biometric methods are lower than the postoperative refraction.
Calculations using the Zeiss IOL-Master and the Allergan Humphrey Ultrasonic
Biometer are closer to patient´s postoperative refraction than calculations
using the Biovision Echograph. Comparing the coefficients of determination
the IOL-Master is the method with the highest accuracy.
Support: Pharmacia GmbH