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Abstract #18484 Published in IGR 3-3
Evaluation of optic disc in open-angle glaucoma with hemifield defect by Heidelberg retinal tomography
Wu L; Kunimatsu S; Suzuki Yet al.Chinese Journal of Ophthalmology 2001; 37: 414
OBJECTIVE: To investigate whether the glaucomatous optic disc change demonstrated by Heidelberg retinal tomography (HRT) is consistent with the distribution of visual field defects, and whether HRT parameters in primary open-angle glaucoma (POAG) and normal-tension glaucoma (NTG) are different. METHODS: Sixty-four eyes of 64 patients with open-angle glaucoma (27 POAG, 37 NTG) and hemifield abnormalities detected by the Humphery Field Analyzer (HFA) were tested by HRT. The HRT parameters and the visual field results were divided into two parts (0-180? and 180-360?) for the corresponding analysis. RESULTS: Compared to the half disc corresponding to the intact hemifield, the half disc corresponding to the defective hemifield had significantly higher values of cup/disc area ratio and cup shape measurement, but significantly lower values of the rim area, and thickness and cross-section area of the retinal nerve fiber layer. No significant differences were found between NTG and POAG eyes regarding the HRT parameters of the half disc corresponding to the defective hemifield. CONCLUSIONS: The optic disc changes detected by HRT are consistent with the distribution of the visual field defects, cup/disc area ratio, cup shape measurement, rim area, mean thickness and cross-section area of the retinal nerve fiber layer, and these are relatively sensitive parameters. That the HRT parameters for NTG and POAG are similar suggests that they could possibly have certain similar mechanisms in the development of glaucomatous neuropathy. LA: Chinese
Dr L. Wu, Department of Ophthalmology, The Second Affiliated Hospital, Medical College of Zhejiang University, Hangzhou 310009, China
Classification:
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)