[Evaluation of the Swedish interactive thresholding algorithm, a new thresholding algorithm, of the Humphrey Field Analyzer in glaucoma patients].

The Swedish interactive thresholding algorithm (SITA) is a new thresholding algorithm that aims to obtain the visual fields of the same quality in a shorter examination time than the conventional up-and-down method. We investigated the correlation between the threshold values obtained by SITA and the conventional thresholding algorithm in 30 glaucoma patients. The results of two types of SITA, i.e., SITA accurate and SITA fast, showed a significant correlation with those of the conventional method (r = 0.855, p < 0.0001 and r = 0.833, p < 0.0001, respectively). There was no statistical relation between the mean deviation (MD) of the conventional method and the difference between MD values of the conventional method, and SITA accurate and SITA fast. The examination time of SITA accurate and SITA fast was 50% and 31% shorter, respectively, than that of the conventional method. The difference in threshold of each test point in the conventional and SITA methods was minor except in one with a deep relative defect. These results indicate that SITA can be useful for detecting glaucomatous visual field defects in a shorter time.