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Abstract #3427 Published in IGR 4-2
Topographical analysis of corneal astigmatism in patients with tilted-disc syndrome
Bozkurt B; Irkec M; Gedik S; Orhan M; Erdener UCornea 2002; 21: 458-462
PURPOSE: To evaluate the corneal topography of patients with tilted-disc syndrome in order to determine the relationship between optic disc dysversion and corneal astigmatism, and the pattern of astigmatism in these patients. METHODS: The study included 23 eyes of 13 tilted-disc syndrome patients with spheric refractive errors ranging between +1.00 and -9.00 D (mean, -4.00 ± 3.4 D) and astigmatic errors ranging between -0.50 and -4.50 D (mean, -1.95 ± 0.93 D). Corneal topography was performed by computer-assisted videokeratoscope topographic modelling system 2 (TMS-2) and incidence of corneal astigmatism, corneal topographic patterns, and mean values of the topographic indices were determined. RESULTS: Corneal topographic analysis showed corneal astigmatism in 22 of 23 patients with tilted discs. Corneal astigmatism was symmetric bow tie pattern in ten eyes (45.45%), asymmetric bow-tie pattern in 11 eyes (50%), and irregular in one eye (4.5%). Among the patients with bow-tie pattern (21 eyes), 14 eyes had with-the-rule astigmatism, one eye had against-the-rule astigmatism, and six eyes had oblique astigmatism. In 18 eyes, astigmatism was corneal, whereas it was combined corneal and lenticular in four eyes and lenticular in one. CONCLUSIONS: In the majority of tilted-disc cases, ocular astigmatism is mainly corneal. Morphogenetic factors in the development of the tilted disc might possibly influence the corneal development in such a way as to result in corneal astigmatism.
Dr. B. Bozkurt, Department of Ophthalmology, Hacettepe University Faculty Of Medicine, Sihhiye 06100, Ankara, Turkey
Classification:
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)
8.5 Other (Part of: 8 Refractive errors in relation to glaucoma)