正常人及青光眼患者中心30°视野光敏感度的定量分析  

Light sensitivity in central visual field

作　　者：吴振中[1] 李毅[1] 蒋幼芹[1] 

机构地区：[1]湖南医科大学附属第二医院眼科

出　　处：《中华眼科杂志》1998年第4期300-303,共4页Chinese Journal of Ophthalmology

摘　　要：目的检测正常人及青光眼（有或无早期视野损害）患者中心视野光敏感度的差异，并提出早期视野损害的识别标准。方法对７５例（１０８只眼）正常人，年龄２０～７８岁；５３例（８２只眼）早期开角型或闭角型青光眼患者，年龄３０～７０岁；采用美国Ｈｕｍｐｈｒｅｙ６１０型视野分析仪，中心３０２程序，检测３０°视野内７６个点的光敏感度。结果正常组与青光眼组间性别与眼别光敏感度差异无显著性。正常眼组２０～４５岁与４６～７８岁组间的光敏感度差异有显著性。计算正常年龄组２０～４５岁和４６～７８岁两个年龄组中心视野每一检测点的８０％正常范围的下限值，距中心每隔１０°光敏感度降低２或３ｄＢ，下方视野光敏感度高于上方视野１或２ｄＢ，鼻侧与颞侧间的光敏感度差异无显著性。有视野缺损的青光眼患者，视野中多个检查点显示光敏感度下降４～８ｄＢ；无视野缺损患者与正常对照组比较，光敏感度降低１或２ｄＢ。结论根据正常眼与８０％正常范围的光敏感度下限值比较结果，提出青光眼视野损害分级标准：Ⅰ级：视野中有数个聚集点的光敏感度下降１～３ｄＢ；Ⅱ级：视野中有数个聚集点的光敏感度下降４～６ｄＢ；Ⅲ级：视野中有数个聚集点的光敏感度下降＞６ｄＢ。Objective To examine the difference in the light sensitivity in the central visual field between the normal subjects and glaucoma patients with or without the early visual field damages and propose the criteria to identify the possible early disturbance in the visual field. Methods The light sensitivity at the 76 locations in the central field was measured in 108 normal eyes of 75 normal volunteers aged from 20 to 78 years and 82 eyes of 53 patients with early open angle or angle closure glaucoma aged from 30 to 70 years on the Humphrey Field Analyzer (Model 610) by using the Central 30 2 program. Results No sex and eye differences in the light sensitivity were found between the two groups. The significant difference in the light sensitivity existed between the age of 20～45 years and the age of 46～78 years in the normal subjects. The lower limit of 80% normal range for each location in the central field of the two age groups was calculated. The light sensitivity decreased by 2～3 dB at every 10 degree from the eccentricity. The light sensitivity in the inferior field was 1～2 dB higher than that in the superior. There was no statistical difference between the nasal and the temporal field. For the patients with the field defects the light sensitivity of many locations decreased by 4～8 dB, and by 1 or 2 dB in the patients without the field defects as compared with the normal control. Conclusions Based on the comparison with the normal control and the lower limit of 80% normal range, we propose the following criteria for classification of damages in the glaucoma visual field. Grade Ⅰ: light sensitivity decreases by 1～3 dB at a cluster of locations in the field; Grade Ⅱ: light sensitivity reduces by 4～6 dB at a cluster of locations in the field; Grade Ⅲ: light sensitivity reduces by more than 6 dB at a cluster of locations in the filed.

关 键 词：视野检查 光阈值 青光眼 正常人 

分 类 号：R770.422[医药卫生—眼科] R775.04[医药卫生—临床医学]