Retinal vessel analyzer (RVA) - design and function

The Retinal Vessel Analyzer (RVA) is a measuring device for online measurement ofthe diameter ofretinal vessels in relation time and locations along the vesse it is furthermore provided with several tools for analyzing the measured data. The fundamental components consist of a jundus camera with CCD measuring camera attached and an advanced imageprocessing unit. The measurement ränge is from 90, temporal resolution is 40ms and measurement resolution is less than Systematic error of non-linearity is S<1,6%, reproducibility is given by Variation coefficient: short term vcs=l,5%, long term vc/=2,<S%.