| Objective:To investigate the effect of visual perception training on binocular function recovery for postoperative patients with intermittent exotropia and the change of perceptual eye position.Methods:61 patients with intermittent exotropia who underwent strabismus surgery from January 2019 to March 2021 in Shanxi Eye Hospital were recruited.including 32 males and 29 females,age(4 to 14)with an average age of(8.89±2.49)years-old.According to the choice of parents and patients,patients were divided into training group(34 cases)and control group(27 cases).The training group received visual perception examination and training for 2 months,while the control group received visual perception examination.Before and after training,binocular visual function 、 near stereopsis and perceptual eye position were examined.SPSS25.0 software was used for statistical analysis.The counting data rate(percentage)indicated that chi-square test and Fisher exact probability method were used for inter-group comparison,mean ±standard deviation((?) ±s)was used for measurement data in accordance with normal distribution,paired t-test was used for intra-group comparison,and non-parametric rank sum test was used for comparison between groups.The rate of rank data(percentage)indicates that the comparison between groups is done by nonparametric rank sum test.The difference was statistically significant(P < 0.05).Results:Before training,23(85.2%)and 26(76.5%)patients in the observation group and the training group had simultaneous visual function,and the difference between the two was not statistically significant(P>0.05);after 2 months of training,23 patients(85.2%)and 33 patients(97.1%)in the observation group and training group had simultaneous visual function,and there was no statistically significant difference between the two groups(P>0.05).Before training,the fusion range of observation group and training group were(12.7±10.2)° and(9.3±9.3)°,and the difference between the two was not statistically significant(Z=-1.26,P>0.05);after training for 2 months,the fusion ranges of the observation group and the training group were(12.7±9.6)°and(17.9±7.9)°.The observation group had no significant change from before training(t=-0.07,P>0.05),and the training group was significantly enlarged(t=-5.55,P<0.05),the difference between the two was statistically significant(Z=-2.04,P<0.05).Before training,there was no statistically significant difference in distance stereo vision function between the two groups of patients(Z=-0.27,P>0.05).After 2 months of training,compared with 2 months ago,the observation group had no significant changes in distance stereo vision function(t=1.73,P>0.05),and the distance stereo vision function of patients in the training group was significantly better than before training(t=5.86,P<0.05),the difference between the two is statistically significant(Z=-2.07,P<0.05).Before training,there was no significant difference in near-stereoscopic vision function between the two groups of patients(Z=-1.25,P>0.05).After 2 months of training,the near-stereoscopic vision function of patients in the observation group and the training group was significantly better than before training(t=3.91,4.59;P<0.05)and the difference between the two was not statistically significant(Z=-1.84,P>0.05).Before training,the degree of horizontal perceptual eye position of observation group and training group were(130.7±112.0)pixels and(105.5±112.0)pixels,and the degree of vertical perceptual eye position of observation group and training group were(16.1±18.3)pixels and(16.6±23.6)pixels,there was no significant difference in the degree of perceptual eye position shift between the two groups(Z=-0.84,-1.06;P>0.05);after 2 months of training,the degree of horizontal perceptual eye position of the observation group and the training group were(100.2±112.2)pixels and(33.3±52.6)pixels,and the degree of vertical perceptual eye position of the observation group and the training group were(15.7±17.2)pixels and(5.4±4.9)pixels,the difference in the degree of perceptual eye position in the observation group was not statistically significant(t=1.01,0.05;P>0.05)and the degree of perceptual eye in the training group was significantly reduced compared to before training(t=4.29,2.75;P<0.05),the difference between the two is statistically significant(Z=-3.24,-3.56;P<0.05).Conclusion:1.Patients with intermittent exotropia have an imbalance between the eyes and a defect of visual central function,which still exists after eye position correction.2.Compared with the traditional eye position examination,perceptual eye position examination can more accurately reflect the degree of postoperative eye position deviation and quantitatively reflect the degree of visual center defect.3.Visual perception training can repair visual central function and reconstruct binocular visual function. |
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