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Abstract #13520 Published in IGR 8-1
Enhanced Glaucoma Staging System (GSS 2) for classifying functional damage in glaucoma
Brusini P; Filacorda SJournal of Glaucoma 2006; 15: 40-46
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.
Dr. P. Brusini, Department of Ophthalmology--S. Maria della Misericordia Hospital, Udine, Italy. brusini@libero.it
Classification:
6.6.2 Automated (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
