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Abstract #8176 Published in IGR 4-3
comparative analysis of changes in optic disc morphology after trabeculectomy, measured by scanning laser tomography
Krzyzanowska P; Jamrozy-Witkowska A; Koziorowska MKlinika Oczna 2002; 104: 122-127
PURPOSE: The aim of this study was to investigate and estimate quantitative changes in optic nerve morphology after glaucoma surgery, using the Heidelberg Retina Tomograph (Heidelberg Engineering, HRT Software 2.01). MATERIAL AND METHODS: The eyes of 42 consecutive patients (34 females and eight males) undergoing trabeculectomy at the Department of Ophthalmology, Wroclaw Medical University, were enrolled in the study. Quantitative analysis of the optic nerve head parameters by scanning laser tomography was performed, as well as automated perimetry, before and after surgery. Postoperative HRT images were obtained at two to three weeks, four to six months, nine to 12 months and > 12 months after surgery. RESULTS: Forty-one patients (97.6%) obtained a postoperative IOP reduction greater than 30%. Two weeks after trabeculectomy, seven HRT parameters showed statistically significant improvement: CA, CV, RA, RV, mean cup depth, CSM. Approximately five months after surgery, only two parameters (mean cup depth and CSM) were statistically changed, as well as 12 months after surgery (mean and max cup depth), which cannot be explained by postoperative disc edema. A corresponding change was also noted in the visual field. There was no statistically significant association between optic disc morphology, as measured by HRT, and the degree of IOP reduction. CONCLUSIONS: All patients showing a 30% lowering of IOP after glaucoma surgery show improved optic nerve morphology, as measured by HRT. Further studies are required to provide information as to what extent the change in optic disc topography is dependent on the duration of elevated IOP or advanced stage of glaucomatous optic neuropathy. LA: Polish
P. Krzyanowska, MD, Katedry i Kliniki Okulistyki Akademii Medycznej, Wroclawiu, Poland
Classification:
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)
6.9.1 Laser scanning (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis)
12.8.1 Without tube implant (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
