[Evaluation of the Friedmann visual field analyser in detecting glaucoma damage]

In order to evaluate the specificity and sensitivity of Friedmann visual field analyser (FVFA) in the detection of early glaucoma, 90 normal eyes were tested to establish the 100% specificity criteria for abnormality. The results by the Friedmann analyser were then compared with those by the tangent perimeter combined with fundal stereophotography of suspect glaucoma disc signs and RNFLD. 40 glaucoma eyes with field defects by the tangent perimeter were all positive by FVFA. Of 80 eyes suspected of glaucoma with elevated IOP and normal tangent perimetry, 20 eyes (25%) showed paracentral relative scotoma by FVFA. 17 (85%) of these 20 eyes demonstrated photographic evidences of glaucoma fundal damage. Thus, early field defects detected by FVFA in glaucoma suspects are likely indicative of glaucoma damage.