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目的 探讨发生于青光眼的中央暗点所具备的临床特征。方法 回顾性非对照的研究。从青光眼患者的视野资料当中筛选中央暗点 ,分析暗点的形态和分布特点、进展情况、受累眼的视力以及相应的眼底改变 ,计算其在青光眼早期视野改变中所占的比率 ,比较该型视野在正常眼压性青光眼、原发性开角型青光眼、原发性闭角型青光眼的早期阶段发生率的差异。结果 发生于青光眼的中央暗点是以水平径线为界的半侧性中央暗点 ,在进展过程中也不跨越该界线 ,而是在同侧扩大加深 ,水平径线侧边界平直 ;在上方视野的发生多于下方视野 ;对视力无明显影响 ;通过存档的彩色立体眼底相片可查见局限性视网膜神经纤维层损害 ,其位置邻近盘斑束。在青光眼早期视野损害当中 ,中央暗点约占 10 5 %。中央暗点可发生于多种类型的青光眼 ,其中 ,三种原发性青光眼的发生情况为 :正常眼压性青光眼 (NPG) 15 9% ,原发性开角型青光眼 (POAG) 7 5 % ,原发性闭角型青光眼(PACG) 5 2 %。在NPG当中的发生率高于高眼压性青光眼 (POAG或PACG) ,其差异具有统计学意义 (P <0 0 5 ) ,POAG与PACG的发生率则无差异 (P >0 0 5 )。结论 发生于青光眼的中央暗点具有自身特征 ,最突出的特点是不跨越水平径线 ,可与其他疾病所致的中央暗点相鉴别 ;发
Objective To investigate the clinical features of central dark spots in glaucoma. Methods Retrospective, non-controlled study. Glaucomatous patients were selected from the field of vision information of the dark spots, dark spots were analyzed morphological and distribution characteristics, progress, affected eye vision and the corresponding changes in the fundus, glaucoma in its early visual field to calculate the ratio of change in the comparison of the type Visual field in the normal tension glaucoma, primary open angle glaucoma, primary angle closure glaucoma in the early stage of the incidence difference. Results The central dark spot occurred in glaucoma was a half-center dark spot with the horizontal diameter line as the boundary. It did not cross this boundary line in the process of progression, but expanded and deepened on the same side, Above the visual field occurs more than the lower field of vision; no significant effect on visual acuity; through the archive of color stereoscopic fundus photographs can be found limitations of retinal nerve fiber layer damage, its location adjacent disk disk bundles. In the early glaucoma visual field damage, the central dark spot about 105%. Central dark spots can occur in many types of glaucoma, of which, the three primary glaucoma conditions are 15 9% of normal tension glaucoma (NPG), 75% of primary open-angle glaucoma (POAG) , Primary angle-closure glaucoma (PACG) 52%. The incidence of NPG was higher than that of POAG or PACG (P <0.05), but there was no difference between POAG and PACG (P> 0.05). Conclusions The central dark spot, which occurs in glaucoma, has its own characteristics. The most prominent feature is that it does not cross the horizontal line and can be differentiated from the central dark spots caused by other diseases.