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zhong jing, Zidong Chen, Jinrong Li, Junpeng Yuan, Daming Deng, Minbin Yu; A Novel Dynamic Random-dot Stereopsis Strategy for Assessing the Dynamic Stereopsis in Intermittent Exotropia Patients. Invest. Ophthalmol. Vis. Sci. 2019;60(9):1796. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To study the dynamic stereopsis in intermittent exotropia (IXT) patients by using a novel dynamic random-dot stereopsis strategy
A novel dynamic random-dot stereopsis implemented on laptop(MacBook Air; Resolution: 1440*900, OS: WIN7; Database: Access2007) included Motion+Disparity(MD, the same dots include different disparity cues moving in opposite directions for the two eyes), Motion(M, the dots move in opposite directions), and Disparity(D, the same dots include different disparity cues moving in the same direction). The disparity cues range from 200 to 1200 sec-arc. 10 IXT patients and 10 normal subjects were included to test its repeatability, the characteristics of the dynamic stereopsis in 83 IXT patients preoperatively were analyzed, and the prognosis was followed up on the 1st day, 2nd, 6th and 12th month postoperatively. The motion coherence and phase combination were used to analyze the relationship between binocular suppression with dynamic stereopsis
The IXT patients and normal subjects showed a good repeatability with correlation coefficients of 0.93,0.97 and 0.94 for MD, M, and D respectively in the test-retest(P<0.001). Preoperatively, the MD had a passing rate of 63.86% and its reciprocal value was 0.002±0.0002 arc-sec, which was less than the normal group of 0.0047±0.0001 arc-sec, and positively correlated with the Newcastle control score and disease course(P<0.05), negatively correlated with prism deviations(P<0.05), while not associated with the age of onset(P>0.05). M had a reciprocal value of 0.0018±0.0001 arc-sec which was less than the normal group of 0.0047±0.0001 arc-sec(P<0.05), and D had a reciprocal value of 0.0012±0.0002 arc-sec which was less than the normal group of 0.0046±0.0001 arc-sec(P<0.05). The postoperative dynamic stereopsis was improved since the 1st day and peaked on the 6th month, which the reciprocal value of MD, M, and D increased to 0.0037±0.0004, 0.0029±0.0005, and 0.0027±0.0005 arc-sec. There was no correlation between Phase and MD, M and D, while a negative correlation between M and Motion(r=0.3703, P <0.05)
This study indicates a novel dynamic random-dot stereopsis program which had good reliability. It had negative correlations among Newcastle control score, disease course, prism deviation with dynamic stereopsis in IXT, and it was improved gradually and peaked on the 6th month postoperatively
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.
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