RAPID TENDENCY ORIENTED PERIMETER (TOP) W ITH THE OCTOPUS VISUAL-FIELD ANALYZER

Purpose To study the capabilities of a new perimetric strategy with th e Octopus visual field analyzer: the Tendency Oriented Perimetry. Meth ods Tendency oriented perimetry (TOP) attempts to assess the visual fi eld by using answers to questions to establish threshold in the neighb oring area. We evaluated 79 visual fields with the Octopus strategy us ing the program 32 and the TOP strategy split into the following group s: normal visual field or glaucoma suspects (52), moderately advanced glaucoma (16), advanced glaucoma (11). The following parameters were a nalyzed for the two strategies studied: examination time, MS (means se nsitivity), MD (mean defect), LV (Loss Variance), short term fluctuati on (RF) and the number of points with a deficit with different p value s: p < 0.5; p < 1; p < 2; p < 5. Results TOP perimetry showed a signif icant reduction of exploration time: 11.87 minutes with the Octopus 32 vs 2.49 minutes with the TOP strategy (p < 0.001). There is no signif icant modification for the other parameters (MD, MS, RF) except for th e LV (Loss Variance) for the global analysis and for each separate gro up.Conclusion The TOP strategy reduces examination time significantly but seems to be less accurate especially for the calculation of the de pth of each scotoma in comparison with the standard Octopus 32 perimet ry.