Omoto T, Murata H, Fujino Y, et al. - In this investigation involving 101 patients with open-angle glaucoma (153 eyes), researchers sought to assess the usefulness of the application of the clustering method to the trend analysis (sectorwise regression) in comparison with the pointwise linear regression (PLR). Using sector regression, the precise prediction was achieved, in particular when a small number of VFs were used in the prediction. In longer follow-up compared with PLR, the accuracy of the sectorwise regression was not hampered.