Paolo Brusini1, Stefano Filacorda. 1. Department of Ophthalmology--S. Maria della Misericordia Hospital, Udine, Italy. brusini@libero.it
Abstract
PURPOSE: To introduce a new method, derived from the Glaucoma Staging System (GSS), for classifying glaucomatous visual field defects. PATIENTS AND METHODS: Four sample groups composed respectively of 471 (sample #1), 128 (sample #2), 185 (sample #3), and 131 (sample #4) patients with either ocular hypertension or chronic glaucoma were considered. The GSS 2 uses both the MD and CPSD/CLV or PSD/LV perimetric indices to classify visual field defect in 6 stages and in 3 types (generalized, localized, and mixed). The formulas were determined using sample #1. A new borderline stage was created, on the basis of sample #2. The relationship between the PSD/LV and CPSD/CLV values was studied on sample #3 to verify the possibility of using the uncorrected indices instead of the CPSD/CLV. The relationship with other classification methods was studied on sample #4. RESULTS: The GSS 2 showed a strong level of association with the AGIS and the Hodapp-Parrish-Anderson methods in staging defect severity. A good correlation was also found with a classification based on the Bebie curve. CONCLUSIONS: The GSS 2 was able to correctly classify both damage severity and perimetric defect type in the sample studied, using either the corrected or uncorrected visual field indices. It is a quick and easy method, and its formulas can be introduced in any software.
PURPOSE: To introduce a new method, derived from the Glaucoma Staging System (GSS), for classifying glaucomatous visual field defects. PATIENTS AND METHODS: Four sample groups composed respectively of 471 (sample #1), 128 (sample #2), 185 (sample #3), and 131 (sample #4) patients with either ocular hypertension or chronic glaucoma were considered. The GSS 2 uses both the MD and CPSD/CLV or PSD/LV perimetric indices to classify visual field defect in 6 stages and in 3 types (generalized, localized, and mixed). The formulas were determined using sample #1. A new borderline stage was created, on the basis of sample #2. The relationship between the PSD/LV and CPSD/CLV values was studied on sample #3 to verify the possibility of using the uncorrected indices instead of the CPSD/CLV. The relationship with other classification methods was studied on sample #4. RESULTS: The GSS 2 showed a strong level of association with the AGIS and the Hodapp-Parrish-Anderson methods in staging defect severity. A good correlation was also found with a classification based on the Bebie curve. CONCLUSIONS: The GSS 2 was able to correctly classify both damage severity and perimetric defect type in the sample studied, using either the corrected or uncorrected visual field indices. It is a quick and easy method, and its formulas can be introduced in any software.
Authors: Grace M Richter; Xinbo Zhang; Ou Tan; Brian A Francis; Vikas Chopra; David S Greenfield; Rohit Varma; Joel S Schuman; David Huang Journal: J Glaucoma Date: 2016-08 Impact factor: 2.503
Authors: Alessandro A Jammal; Nara G Ogata; Fábio B Daga; Ricardo Y Abe; Vital P Costa; Felipe A Medeiros Journal: Am J Ophthalmol Date: 2018-09-17 Impact factor: 5.258
Authors: David F Lobach; M Andrew Waters; Shelley Keatts; Kathy L Kimrey; Jennifer V Caldwell; William Rafferty; Sanjay Asrani; Paul P Lee Journal: AMIA Annu Symp Proc Date: 2010-11-13
Authors: Carlos Gustavo De Moraes; Ashley Sun; Ravivarn Jarukasetphon; Rashmi Rajshekhar; Lynn Shi; Dana M Blumberg; Jeffrey M Liebmann; Robert Ritch; Donald C Hood Journal: JAMA Ophthalmol Date: 2019-02-01 Impact factor: 7.389