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Abstract #10308 Published in IGR 6-1
The distribution of cup disc ratios in a general population of Southern Togo aged 40 years and over
Balo KP; Anika A; Banla M; Agla K; Djagnikpo PA; Koffi Gue KBJournal Français d'Ophtalmologie 2004; 27: 250-255
PURPOSE: Clinical reports and epidemiological surveys have raised the key issues on both the burden of glaucoma blindness and the high prevalence of the disease among the population of Togo. This population survey aimed to collect data on the distribution of cup disc ratios. PATIENTS AND METHODS: The study population of 685 persons was selected in a remote rural area. All participants aged over 40 years were included. Eye assessment was conducted in the local health facilities using a visual acuity chart, an ophthalmoscope, and light magnification for exploration of the anterior segment. RESULTS: The mean age of participants was 49.70 years (range, 40-99 years); males accounted for 61.8% and females 38.2%. Mean cup disc ratios were not different in both eyes, with 0.38 in the right eye and 0.37 in the left. Cup disc ratios over 0.5 represented 29.3% in the right eye and 29.8% in the left; a cut-off point over 0.7 gave an abnormal cup ratio prevalence of 9.2% in the right eye and 9.3% in the left. In 92% of cases, the appearance of the cupping was round, and it was elliptic in 7.6% of patients. The authors found that 75% of discs had a central round cupping. A temporal location was noted in 22% of cases, while nasal locations were recorded in 2.4%. CONCLUSIONS: This survey noted the various patterns of cup discs, with a mean cup disc ratio similar to that usually described in similar studies. Further population-based surveys using the cut-off ratios found here are needed to determine the prevalence of glaucoma in this rural area. LA: French
Dr. K.P. Balo, Service d'Ophtalmologie, CHU Tokoin, Lome, Togo. komibalo@yahoo.fr
Classification:
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)
