视疲劳患者眼动参数的研究

Study on parameters of binocular vision in asthenopia patients

目的:研究不同因素所致视疲劳患者眼动参数的异常,初步探讨刺激性AC/A与视疲劳之间的关系。方法:序贯选取江苏省中医院眼科门诊视疲劳患者84例,根据有无屈光因素分为A(屈光性)、B(非屈光性)两组各42例,进行6m,40cm,40cm+1D隐斜量的测量,计算各患者的计算性AC/A和梯度性AC/A,分别与Morgan正常值进行比较,并进行两两比较。结果:A组,B组的远距离隐斜均明显大于此Morgan值(P<0.05),同样A组,B组的近距离40cm处隐斜量也大于Morgan值(P<0.05),而A组,B组的梯度性AC/A值均要显著低于4/1(P<0.05),但A,B两组之间远、近距隐斜及计算性AC/A、梯度性AC/A等参数的差异无统计学意义(P>0.05)。结论:视疲劳患者较正常人群在远近距离具有更高的外隐斜,而具有较低的梯度性AC/A值,刺激性AC/A值尚不能作为不同类型视疲劳的分类指标。

AIM ：To investigate the asthenopia patients＇ discrepancy of distance phoria, near phoria and accommodation convergence/accommodation（AC/A） caused by different factors. METHODS： Eighty-four asthenopia patients from outpatient department of Jiangsu Province Hospital of TCM were selected consecutively. The sample was divided into two groups： A group （wrong corrected） and B group （corrected well）. Standard 6m, 40cm, 40cm ＋ 1 D phoria examinations were operated, and AC/A was calculated, gradient AC/A were computed. All results were compared with Morgan value, and results of group A were also compared with those of group B. RESULTS：The 6m phoria of both group A and B were higher than the Morgan value（ P〈 0.05）. Likely, the 40cm phoria of both group A and B were also higher than the Morgan value（ P〈 0.05）. However, the results of gradient AC/A of both group A and B were lower than 4/1 （P 〈 0.05）. There was no significant difference between group A and B in all parameters above（P〉0.05）. CONCLUSION： The asthenopia patients have higher exophoria in both distance and near phoria than normal, while they have lower gradient AC/A. Stimulated AC/A can not be regarded as a factor to classify different asthenopia types.