RESUMO
Objective To evaluate choroidal thickness (CT) in healthy and primary open-angle glaucoma (POAG) eyes using deep-range imaging optical coherence tomography (DRI-OCT) and to analyze the relationship between choroidal thickness and glaucoma.Methods Totally 140 patients (216 eyes) with POAG were selected as glaucoma group,and 67 patients (106 eyes) with normal eyes as normal group.The optical coherence tomography produced by Japanese company (Topcon) was used to detect CT in both groups.The association between CT and potential confounding variables including age,axial length,central corneal thickness,systolic pressure,diastolic pressure,systolic perfusion pressure,diastolic perfusion pressure,intraocular pressure,and visual field defects were examined by using univariable and multivariable regression analyses.Results The age,axial length,systolic blood pressure and systolic blood pressure of the glaucoma group were all higher than those of the normal group (all P ＜0.05),and the subjects in the glaucoma group had more severe visual field damage,and the difference of visual field defect was statistically significant (P ＜ 0.001).There was no significant difference in corneal thickness,diastolic blood pressure,intraocular pressure and diastolic perfusion pressure between the two groups (all P ＞ 0.05).The CT was (157.70 ± 48.54) μm in the glaucoma group,and (179.9 ± 36.1) μm in the normal group,respectively,and the difference was statistically significant (P ＜ 0.001).Uninitiated regression analysis showed that CT was negatively correlated with age,axial length and glaucoma (all P ＜ 0.05).Multivariate regression analysis showed that there was no significant difference in CT between glaucoma group and normal group when the length of the age and the axis of the eye were corrected (P =0.216),and moreover,there was also no association between glaucoma severity and CT.Conclusion Glaucoma is not associated with CT measured using DRI-OCT;however,older age and longer axial length were associated with thinner CT,so CT cannot be used as a marker for diagnosing POAG and assessing the condition of the disease.