Correlation between optic disc parameters of HRT-II and visual field defects in primary open angle glaucoma and suspected open angle glaucoma

Objective To study the correlation between optic disc parameters of HRT-Ⅱand mean defect(MD)of visual field in primary open angle glaucoma(POAG)and suspected open angle glaucoma.Methods 69 patients(128 eyes)with POAG and 42 cases(78 eyes)with suspected open angle glaucoma were examined with Oculus twinfield static threshold perimetry test(program 24-2)and HRT-Ⅱ.The parameters of HRT-Ⅱon optic disc were analyzed for the correlation with MD of visual field.Results There were remarkable differences in optic disc parameters of two groups(P0.001).The optic disc parameters(RA,C/D AR and CA)have marked correlation with MD in POAG(P0.001).It showed an increase of 7.291dB in MD with each 1mm~2 decrease in neuroretinal rim area.Conclusions In all of the optic disc parameters of HRT-Ⅱ,RA can well reflect the glaucomatous visual field loss best.