Naoki Tojo1, Atsushi Hayashi2, Mitsuya Otsuka2. 1. Department of Ophthalmology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan. tojo-naoki@umin.ac.jp. 2. Department of Ophthalmology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan.
Abstract
PURPOSE: We investigated the correlations between 24-h continuous intraocular pressure (IOP) measurement with a contact lens sensor (CLS) and visual field (VF) progression. METHODS: We examined 69 eyes of glaucoma patients who were followed > 2 years after the measurement of IOP fluctuation with a CLS. All patients underwent VF examinations > 4 times. VF progression was defined as a deterioration of the mean deviation (MD). We evaluated the original 17 parameters from the data obtained from the CLS output and attempted to identify which of them contributed to the VF progression. We then performed multivariate analyses to identify risk factors for rapid VF progression. RESULTS: The mean follow-up period was 4.0 ± 1.6 years. The mean VF progression rate was - 0.37 ± 0.53 dB/year. The multivariate analysis identified the following as-risk factors for VF progression: more advanced baseline MD value (p = 0.0269); high maximum values during the 24-h (p = 0.0131) and nocturnal (p = 0.0466) periods; large standard deviation of IOP fluctuation during the 24-h (p = 0.0404), diurnal (p = 0.0330), and nocturnal (p = 0.0027) periods; and large range of IOP fluctuation during the nocturnal period (0.0431). CONCLUSIONS: Our results suggested that the above CLS parameters might be correlated with rapid progression of VF disorder. These CLS parameters could be used to evaluate the results of CLS in the future. Examination with a CLS could be useful for predicting the VF progression rate within a mere 24-h period.
PURPOSE: We investigated the correlations between 24-h continuous intraocular pressure (IOP) measurement with a contact lens sensor (CLS) and visual field (VF) progression. METHODS: We examined 69 eyes of glaucomapatients who were followed > 2 years after the measurement of IOP fluctuation with a CLS. All patients underwent VF examinations > 4 times. VF progression was defined as a deterioration of the mean deviation (MD). We evaluated the original 17 parameters from the data obtained from the CLS output and attempted to identify which of them contributed to the VF progression. We then performed multivariate analyses to identify risk factors for rapid VF progression. RESULTS: The mean follow-up period was 4.0 ± 1.6 years. The mean VF progression rate was - 0.37 ± 0.53 dB/year. The multivariate analysis identified the following as-risk factors for VF progression: more advanced baseline MD value (p = 0.0269); high maximum values during the 24-h (p = 0.0131) and nocturnal (p = 0.0466) periods; large standard deviation of IOP fluctuation during the 24-h (p = 0.0404), diurnal (p = 0.0330), and nocturnal (p = 0.0027) periods; and large range of IOP fluctuation during the nocturnal period (0.0431). CONCLUSIONS: Our results suggested that the above CLS parameters might be correlated with rapid progression of VF disorder. These CLS parameters could be used to evaluate the results of CLS in the future. Examination with a CLS could be useful for predicting the VF progression rate within a mere 24-h period.