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Abstract #5548 Published in IGR 2-1
Correlation between neuroretinal rim and optic disc areas in normal melanoderm and glaucoma patients
Balo KP; Mihluedo H; Djagnikpo PA; Akpandja MS; Béchetoille AJournal Français d'Ophtalmologie 2000; 23:37-41
BACKGROUND: To evaluate optic disc size and its relationship with neuroretinal rim areas. MATERIAL AND METHODS: The study was prospective; 400 hundred patients with 292 glaucomatous and 108 non-glaucomatous were enrolled in the study. Optic disc size quantification was assessed by the use of Goldmann three-mirror contact lens; diameter reading was adjusted by the magnification factor of the lens, squares of the disc and the cupping were calculated using an ellipse formula, the neuroretinal rim area was then obtained by reducing the cupping area from the whole optic disc area. RESULTS: The mean age of the sample was 36.80 years (SD, 15.68 years). The average value of the vertical disc diameter was 2.045 mm (SD, 0.254) for glaucoma patients and 1.966 mm (SD, 0.237) in the control group (p < 0.001). Neuroretinal rim area was 1.886 mm2 (SD, 0.675) in the glaucoma group, and 2.165 mm2 (SD, 0.425) in the control group (p < 0.004). In the glaucoma group, 72.97% of large optic discs were found (vertical diameter over 1.90 mm), and 63.80% in the control group. In the control group, neuroretinal rim area was wider in the large optic discs compared to the smaller (p < 0.001), Anova test. The neuroretinal rim area was thinner in glaucomatous large discs compared to controls (p < 0.005, Student's test). Meanwhile, there was no difference in the medium and small discs in either the glaucoma or the control groups (p>0.005, Student Newmann test). CONCLUSIONS: Neuroretinal rim areas are thinner in large glaucomatous discs compared to non-glaucomatous large discs. In Africa, this parameter could be helpful in the diagnosis and survey of glaucoma patients. LA: French
Dr. K.P. Balo, Service d'Ophtalmologie, CHU Lome, 3001 Lome, Togo komibalo@syfed.tg.refer.org
Classification:
1.1 Epidemiology (Part of: 1 General aspects)
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)
