原发性开角型青光眼视乳头旁脉络膜萎缩区的双眼对照研究

目的研究单眼视野缺损的原发性开角型青光眼患者双眼间视乳头旁脉络膜萎缩区（PPA）的出现频率和面积大小差异。方法利用计算机图像分析系统对视乳头立体照相进行测量,比较40例单眼视野缺损的原发性开角型青光眼患者双眼间PPA的发生率及大小差异。所有入选患者的屈光度（等效球镜）均在-3．00-＋3．00D之间。结果视野缺损眼的视杯面积、杯盘面积比均大于视野正常眼,差异有统计学意义（视杯面积：t=5．332,P〈0．01;杯盘面积比：t=5．126,P〈0．01）。视野缺损眼的α区面积略大于视野正常眼,差异有统计学意义（t=3．02,P=0．0045）;双眼间β区面积差异无统计学意义（S：13．5,P=0．426）;双眼α区与β区的发生率均存在一致性（α区：Х^2=0．00,P=1．000;β区：Х^2=1．2857,P=0．2568）。结论在排除了-3．00D以上的中高度近视眼人群后,单眼视野缺损的原发性开角型青光眼α区、β区的有无和13区的大小均不能很好地反映双眼间视野缺损的差异。

Comparison of peripapillary atrophy in eyes with unilateral visual field defect in patients with primary open-angle glaucoma and normal tension glaucoma

OBJECTIVE: To evaluate the difference of the peripapillary atrophy between two eyes of unilateral visual field defect in each of patient with primary open-angle glaucoma (POAG) and normal tension glaucoma (NTG). METHODS: This study included 40 eyes with unilateral visual field defect in patients with POAG (20 cases) and NTG (20 cases). Color stereo optic disc photographs were morphometrically evaluated by a video camera and a computer system. The refractive range (spherical equivalent) of all these subjects was between -3.00D and +3.00D. RESULTS: The cup areas (CA) and cup/disc areas (CA/DA) in eyes with visual field defect were significantly larger than in eyes with normal visual field (CA: t=5.332, P<0.01; CA/DA: t=5.126, P<0.01). The alpha zone areas (alphaA) of PPA were significantly enlarged in visual field defect eyes compared with visual field normal eyes (t=3.02, P=0.0045), while there is no significant difference in beta-zone area (betaA) between two eyes. (S=13.5, P=0.426). The frequency of the PPA (alpha-zone and beta-zone) occurrence were also similar in both eyes. (alphaA: chi(2)=0.00, P=1.000; betaA: chi(2)=1.2857, P=0.2568). CONCLUSION: The results suggest that either beta-zone area or the presence of PPA is not closely correlated to the visual field defect in POAG and NTG patients with exclusion of moderate or high myopia.