Abstract

SO.15.06

Neuroretinal rim analysis in POAG

Marjanovic I.¹, Kontic D.¹, Hentova-Sencanic P.¹, Markovic V.¹, Bozic M.¹, Milic N.^2
1Institute of eye diseases Clinical Centre of Serbia, Belgrade, Serbia; ²Institute for medical statistics and informatics, medical faculty University of Belgrade, Serbia

Objective: To analyse neuroretinal rim in POAG.
Methods: Sixty-six eyes of 33 patients 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.) in the Institute of eye diseases in Belgrade. Neuroretinal rim was defined as a 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 in neuroretinal rim, according to c/d ratio existed in 34 eyes (51, 51%), but 32 eyes (48, 48%) were without frequency of progression. Progression existed in 12 eyes (18,18%) in temporal (T), 7 eyes (10,6%) in temporal superior, 14 eyes (21,21%) in temporal inferior, 8 eyes (12,12%) in nasal, 7 eyes (10,6%) in nasal superior, and 13 eyes (19,69%) in nasal inferior segment. Without progression were 5 eyes (7, 58%).
Conclusions: Neuroretinal rim in our study was mostly damaged in nasal (N) and temporal inferior (TI) segments. Least resistant were temporal inferior (TI) and nasal inferior (NI), but most resistant was nasal superior (NS) segment. Most sensitive parameter was c/d ratio. Accessory of the neuroretinal rim changes is of importance in POAG assay.

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