title: [Application of disparity discriminating accuracy test in evaluating the stereopsis of postoperative intermittent exotropia].
abstract: OBJECTIVE
  To discuss the application of disparity discriminating accuracy test in evaluating the stereopsis of postoperative intermittent exotropia.
  
  
  METHODS
  Patients with intermittent exotropia who underwent surgery during July 2011 to June 2013 were followed up. The stereoacuity was examined by Titmus Stereotest, Randot Stereotest and Frisby Stereotest. Twenty adult cases whose stereoacuity reached normal were chosen as experimental group. Twenty healthy adults were selected as normal control group. Both groups were examined with disparity discriminating accuracy test. Discriminating accuracy of the two groups were analyzed with Two-Way ANOVA method. Test-retest reliability was analyzed with Intraclass Correlation Coefficient analysis.
  
  
  RESULTS
  The test-retest reliability of disparity discriminating accuracy test is excellent (ICC=0.99, P<0.01) . Discriminating accuracy under different disparities in experimental group were 0.56±0.09, 0.67±0.14, 0.77±0.15, 0.82±0.14, 0.85±0.11, 0.85±0.14, 0.87±0.10, 0.84±0.16, while those in control group were 0.77±0.09, 0.88±0.09, 0.93±0.08, 0.91±0.09, 0.95±0.08, 0.96±0.05, 0.97±0.06, 0.96±0.04. There were statistically significant differences between them (F=38.06, P<0.01) . The discriminating ability of group grating in both groups was affected by the size of disparity. Under situation of small disparity, a large difference was found between the experimental group (0.67±0.12)and control group(0.86±0.07) (F=4.84, P<0.05).
  
  
  CONCLUSIONS
  Stereoscopic function can be evaluated comprehensively with disparity discriminating accuracy test. Use this test, a certain degree of dysfunction in stereopsis can still be found in postoperative intermittent exotropic patients who reached normal stereoacuity examined with traditional stereotests. (Chin J Ophthalmol, 2016, 52: 584-588).
authors: Department of Ophthalmonogy, the First Hospital of Anhui Medical University, Hefei 230022, China.
authors: L X
authors: LX
authors: Feng
authors: J Y
authors: JY
authors: Yao
authors: L
authors: L
authors: Chen
authors: Y
authors: Y
authors: Tang
authors: F
authors: F
authors: Hou
mesh_terms: D000328:Adult; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D003867:Depth Perception / Q000502:physiology*; D005099:Exotropia / Q000150:complications*; D005260:Female; D006801:Humans; D008297:Male; D011183:Postoperative Complications; D011184:Postoperative Period; D015203:Reproducibility of Results; D015357:Vision Disparity; D014787:Vision Tests / Q000379:methods* / Q000706:statistics & numerical data; D014792:Visual Acuity / Q000502:physiology*