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Short-term intra-individual variability in heidelberg retina tomograph II
N Verdonck1, T Zeyen, L Van Malderen
1Dept. of Ophthalmology, University Hospital St Rafaël, Capucijnenvoer 33, 3000 Leuven.
Bulletin De La Societe Belge D'Ophtalmologie
|February 5, 2003
Abstract:
We determined the short-term intra-individual variability for each parameter of the Heidelberg Retina Tomograph II (HRT II). Therefore we examined prospectively 20 healthy volunteers 3 times within 2 weeks. The variability was expressed as the coefficient of variation for each parameter. The short-term intra-individual variability in normal subjects was < or = 12% in all but 3 parameters. Rim Area was the least variable parameter (2 +/- 1%). Cup Volume had the highest variability (25 +/- 38%).