头位倾斜对黄斑中心凹-视盘中心夹角度数的影响

The influence of head tilt on fovea-disc angle

目的 探讨头位倾斜对于黄斑中心凹-视盘中心夹角（FDA）度数的影响.方法 自身对照研究.使用3D OCT-1000对26例（52眼）非斜视受检者分别拍摄正位、头右倾30°、头左倾30°时眼底照片,并用CorelDRAW X4绘图软件测量照片中FDA度数.数据进行t检验、方差分析及线性回归分析.结果 FDA度数：右眼头右倾时为13.53°±3.36°,正位时为6.56°±2.28°,头左倾时为-0.53°±3.88°,三者差异具有统计学意义（F=115.866,P＜0.05）;左眼头右倾时为1.08°±3.31 °,正位时为7.31°±2.80°,头左倾时为13.45°±3.44°,差异具有统计学意义（F=98.437,P＜0.05）.不同性别间FDA值差异无统计学意义（t=0.906,P＞0.05）.年龄与时间无相关性（r=0.001,P＞0.05）.结论 头位倾斜对于FDA度数有显著的影响,临床工作中采用眼底照相评价患者的眼底旋转状态时应注意头位的摆放.

Objective To explore the influence of head tilt on fovea-disc angle （FDA）.Methods This was a self-controlled study.3D OCT-1000 was used to take fundus photos for 26 non-strabismus subjects （52 eyes） at entopic position,head to the right at 30° and head to the left at 30° respectively.CorelDRAW X4 drawing software was used to measure the FDA values in these photos.The data were analyzed using t test,analysis of variance and linear regression.Results FDA values：the differences in right eye among head to the right （13.53°±3.36°）,entopic position （6.56°±2.28°） and head to the left （-0.53°±3.88°） had statistical significance （F=115.866,P〈0.05）.The FDA value of head to the right was significantly higher than that of the entopic position （P〈0.05）,while the FDA value of the entopic position was significantly higher than head to the left （P〈0.05）.The differences in left eye between head to the right （1.08°±3.31°）,entopic position （7.31°±2.80°） and head to the left （13.45°±3.44°） had statistical significance （F=98.437,P〈0.05）.The FDA value of head to the right was significantly lower than that of the entopic position （P〈0.05）,while the FDA value of the entopic position was significantly lower than head to the left （P〈0.05）.There were no significant differences between the FDA values of different genders （t=0.906,P〉0.05）.The FDA values were not correlated with age （r=0.001,P〉0.05）.Conclusion Head tilt has a significant influence on fovea-disc angle.In clinical practice,when fundus photography is used to evaluate the fnndus rotation of patients,attention should be paid to the placement of head.