弱视眼静态视野光敏感度阈值及P一VEP变化特点的研究  

Study on the light sensitivity threshold in the static perimetry and the caracters of P-VEP changes of the amblyopic eyes

作　　者：朱云[1] 盂令勇 吕大光[1] 孟祥成[1] 

机构地区：[1]哈尔滨医科大学附属第一医院眼科,哈尔滨市穆斯林医院眼科

出　　处：《中国斜视与小儿眼科杂志》1995年第2期57-60,共4页Chinese Journal of Strabismus & Pediatric Ophthalmology

摘　　要：选择单眼弱视患儿５４例，其中弱视眼５４眼，正常眼５４眼，对其进行不同背景光照度静态视野分辨阈值及Ｐ一ＶＥＰ变化特点的对比研究。结果表明：弱视眼在２０℃视野范围内，静态光敏感度阈值均较正常眼有不同程度的降低（Ｐ＜０．０５至Ｐ＜０．０１），以５°内变化明显。弱视眼Ｐ一ＶＥＰ变化特点为其Ｐ１峰潜时在各种空间频率刺激时，均较正常眼有延长趋势，Ｐ１振幅也均较正常眼有降低趋势。弱视程度不同其受累的Ｐ一ＶＥＰ空间频率也不同。轻度弱视仅表现出高空间频率的改变，中及重度弱视则由高空间频率改变向全空间频率改变发展。Abstract54Cases ofchildrewithunilateroal amblopiceye , including 54 amblyopic eyes and 54 normal eyes,were selected and tested w i th s ta tic perime ter underdifferent background illuminations and p一VEP. Thestatic perimetry thresholds of ligh t sensitivity andcharacters of p一VEP changes of both amblyo pic andnomal eyes were studied. Compared with normaleyes, the results showed that the light sensi tivitythresholds of amblyopic eyes within central 20°visu-al field reduced to varying degrees(P<0.05～P<0.01), especially obviously within central 5°visu-al field. The character of p一VEP changes was thatthe P1laten t stage unde r stimulation by differentspace frequencies had more prolonged tendency thanthat o f normal eyes.The P1 amplitude had reducedtendency,compared with normal eyes. Theam b lyopic e yes with different degrees had differentspace frequencies involved in p一VEP,mildam blyopi a o nly showed changes of high spacial fre-quency, moderate and serious amblyoia showedtendency of change from high spacial frequency tofull spacial frequency.

关 键 词：单眼弱视 P-VEP 正常眼 光敏感度 静态视野 改变 空间频率 轻度 PVEP 重度弱视 

分 类 号：R777.44[医药卫生—眼科] R775[医药卫生—临床医学]