The correlation between the structural parameters provided by the Heidelberg retina tomography (HRT) and laser diagnostics glaucoma scanning system (GDx) in primary open angle glaucoma / 眼科

ABSTRACT

Objective To investigate the correlation between the structural parameters provided by the Heidelberg retina tomogra- phy (HRT) and the structural parameters provided by laser diagnostics glaucoma scanning system (GDx), to discuss whether the correla- tion between them be used to make a more accurate diagnosis. Design Case control study. Participants Thirty-two patients (49 eyes) with primary open angle glaucoma and 15 patients only with abnormal GDx results. Methods The patients underwent examination with HRT, GDx. The relations between the topographic parameters of GDx Ecc and HRT were analysed by linear regression. F test was used to analyse whether there was a spatial correspondence between the GDx Ecc and HRT I]. Maim Outcome Measures The topographic parameters generated by GDx Ecc and HRTⅡ. Results In glaucoma group, among the topographic parameters generated by GDx Ecc and HRTⅡ. The correlation between NFI and rim area was significant (r=-0.68,P=-0.000). The spatial correspondence between GDx Ecc and HRTⅡwas also significant. In control group, NFI and rim area also had the significant correlation among the parameters of optic nerve head and retinal nerve fiber layer (r=-0.79, P=0.001). But there was no spatial correspondence between the GDx Ecc and HRTⅡ. Conclusions There is a spatial correspondence between GDx and HRT, but this correspondence doesn't existence in patients only with abnormal GDx result. This difference can be used to make a more accurate diagnosis.