Abstract:AIM: To show frequency of progression and the progression at the optic disc in primary open angle glaucoma (POAG). METHODS: A total of 33 patients (66 eyes), 14 male and 19 female, aged 14 to 79 with POAG were imaged using the Heidelberg Retina Tomography II (HRT II) three or more times during follow-up periods of 6 years (2000-2006). Disc progression was determined by regression analysis of global and segmental changes in optic disc parameters. Every patient was tested by Octopus G1 once a year. Imaged optic disc parameters with scanning laser tomography were: rim area (ra), cup/disc (C/D), rim volume (rv), mean RNFL thickness (mRNFL). Imaged segments of the optic disc were global (G), temporal (T), temporal superior (TS), temporal inferior (TI), nasal (N), nasal superior (NS) and nasal inferior (NI). RESULTS: Global frequency of progression according to c/d ratio existed in 34 eyes (51%), but 32 eyes (48%) were without frequency of progression. Progression existed in 12 eyes (18%) in temporal, 7 eyes (10.6%) in TS, 14 eyes (21%) in TI, 8 eyes (12%) in N, 7 eyes (10.6%) in NS, and 13 eyes (20%) in NI segment. Without progression were 5 eyes (8%). CONCLUSION: Disc progression in our study is mostly in N and TI segments. Most frequently are stricken TI and NI, but most infrequently NS segment. Most sensitive parameter is c/d ratio. Segmental scanning is of importance in POAG progression analysis.
