Compare Of Different Stereoacuity Tests In Patients With Intermittent Exotropia

Objective:To compare the first generation stereoscopic test charts,the third generation stereoscopic test charts,random-dot stereograms and the Distance Randot test in patients with intermittent exotropia.Methods:Patients with intermittent exotropia were examined by the first generation stereoscopic test charts,the third generation stereoscopic test charts,random-dot stereograms and the Distance Randot test preoperatively and 2 and 10 weeks postoperatively.Wilcoxon signed-rank test was conducted to analysis the differences between the third generation stereoscopic test charts and the first generation stereoscopic test charts and the differences between the Distance Randot test and random-dot stereograms.Chi-square test was conducted to analysis the data preoperatively and 2 and10 weeks postoperatively.Results:The differences between the third generation stereoscopic test charts and the first generation stereoscopic test charts had no statistically significance(U=1.338,P=0.181),but the results of the third generation stereoscopic test charts were superior to that of the first generation stereoscopic test charts.Preoperatively and 2 and 10 weeks postoperatively,the results of the first generation stereoscopic test charts and the third generation stereoscopic test charts were improved and the differences were statistically significant(?~2=65.5、58.5,both P<0.001).The differences between the Distance Randot test and random-dot stereograms had no statistically significance(U=1.332,P=0.183),but the results of the Distance Randot test were superior to that of random-dot stereograms.Preoperatively and 2 and 10 weeks postoperatively,the results of random-dot stereograms and the Distance Randot test were improved and the differences were statistically significant(?~2=76.0、77.0,both P<0.001).Conclusion:Surgical intervention is of significance in improving the near and distance stereopsis of patients with intermittent exotropia.The differences between the third generation stereoscopic test charts and the first generation stereoscopic test charts had no statistically significance,so the third generation stereoscopic test charts could replace the first generation stereoscopic test charts in the examination of near stereopsis of patients with intermittent exotropia.The differences between the Distance Randot test and random-dot stereograms had no statistically significance,so the Distance Randot test could replace random-dot stereograms in the examination of distance stereopsis of patients with intermittent exotropia.The third generation stereoscopic test charts and the Distance Randot test are simple and reliable,which are more suitable in clinical work than the first generation stereoscopic test charts and random-dot stereograms.