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Abstract #9211 Published in IGR 5-2
Frequency doubling perimetry in terminal visual field defects
Munoz-Negrete FJ; Rebolleda G; Gonzalez-Martin-Moro J; Cerio-Ramsden CDArchivos de la Sociedad Española de Oftalmologia 2003; 78: 203-209
PURPOSE: To evaluate the frequency doubling technology (FDT) in end-stage glaucomatous visual field defects. METHODS: FDT (C-20 threshold test) was performed in 22 consecutive patients presenting with an end-stage visual field defect with 24-2 SITA (0 dB in more than 75% and less than 100% of the visual field). Comparisons of the percentage of non-abolished points, topographic correlation, test duration and global indexes were performed between C-20 and 24-2 SITA test. RESULTS: FDT sensitivity was 100%. C-20 test showed 13.7% more points with sensitivity greater than 0 dB compared to 24-2 test (p = 0.002). Two and a half less minutes were required for C-20 test performing (p < 0.001). Mean value of the mean defect was 11.48 dB better in FDT (p = 0.000). Mean value of the pattern standard deviation was 5.37 dB (SD: 1.92) and 6.35 dB (SD: 3.61) for the 24-2 and C-20 tests, respectively (p = 0.258). The inferotemporal quadrant was the best conserved in both perimetric strategies (kappa agreement test value = 0.911; p < 0.001). CONCLUSIONS: FDT showed greater ability than 24-2 test for end-stage visual field defects evaluation, with the advantage of being less time-consuming. Very good topographic correlation between both strategies was found. Further studies evaluating FDT reproducibility in severe glaucomatous visual field damage are necessary. LA: Spanish
Dr. F.J. Munoz-Negrete, Servicio de Oftalmologia, Unidad de Glaucoma, Hospital Ramon y Cajal, Madrid, Spain. franciscojmunoz@telefonica.net
Classification:
6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)