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Abstract #5330 Published in IGR 1-2
Optic nerve head morphologic characteristics in high-tension and normal-tension glaucoma
Iester M; Mikelberg FSArchives of Ophthalmology 1999; 117: 1010-1013
OBJECTIVES: To determine the morphometric parameters in high-tension glaucoma (HTG) and normal-tension glaucoma (NTG) with a confocal scanning laser ophthalmoscope, and to determine the relationship to disc size. METHODS: 186 patients with glaucoma were recruited for this study. For each patient, only one eye was randomly chosen. Patients with NTG and HTG were classified using untreated intraocular pressure (IOP) as the variable; the NTG group had IOP less than 22 mmHg during a diurnal tension curve, while patients with HTG had IOP greater than 21 mmHg in at least 3 measurements. All the patients were examined with Humphrey perimeter program 30-2 and a Heidelberg Retina Tomograph. Findings were assessed by t test. Patients were then divided by disc area size into 3 subgroups: small discs with an area less than 2 mm?, midsized discs with an area of 2-3 mm?, and large discs with an area greater than 3 mm?. RESULTS: 132 HTG eyes and 50 NTG eyes were assessed. Four eyes were excluded because they were classified as having secondary glaucoma. No significant differences were found between HTG and NTG eyes for any Heidelberg Retina Tomograph morphometric parameters, even when patients were divided into subgroups. CONCLUSION: No differences were apparent between HTG and NTG in morphometric parameters as measured by scanning laser ophthalmoscopy.
M. Iester, Department of Ophthalmology, University of British Columbia, Vancouver, BC; Canada
Classification:
9.2.4 Normal pressure glaucoma (Part of: 9 Clinical forms of glaucomas > 9.2 Primary open angle glaucomas)
