Abstract
Objective To investigate the relationship between Strabismus Angle and Convergence Parameters of intermittent exotropia.Methods Based on the size of strabismus angle,48 intermittent exotropia patients with different strabismus angle degrees were enrolled and divided into 3 groups.Respectively,strabismus angle,positive and negative fusion range,positive and negative fusional vergence,near point of convergence and AC/A rate were collected.Statistical analysis of these test results and the strabismus angle of intermittent exotropia were performed.All statistical correlation analyses were performed using SPSS15.0 software.Results The average strabismus angle degree of 48 intermittent exotropia patients at 5m distance∶-13.19±8.40△ average at 33cm distance∶-18.79±6.80△ Intermittent Exotropia average∶ 7.29±4.73,Negative Fusion Range average∶-4.28± 4.55,Near Point Of Convergence average:Break Point∶ 7.50±2.43,Recovery Point:8.74±2.84.Far Positive Fusional Vergence average∶ Blur point∶ 12.34±6.90,Break Point∶ 18.48±7.63,Recovery Point∶ 10.76±7.19; Far Negative Fusional Vergence average∶ Blur point∶ 14.30±6.22,Break Point∶ 21.52±6.94,Recovery Point∶ 8.34±7.92,Near Positive Fusional Vergence average∶ Blur point∶ 18.03± 8.16,Break Point∶ 28.13±7.85,Recovery Point∶ 20.25±18.70; Near Negative Fusional Vergence average∶ Blur point∶ 14.21±7.04,Break Point∶ 21.55±6.96,Recovery Point∶ 8.06±7.99,AC/A Rate average∶ 1.89±1.03.Only negative fusion and Negative Fusional Vergence had a negative correlation with Strabismus Angle in Intermittent Exotropia,the difference was significant (P ＜0.01).Conclusions In Intermittent Exotropia,there are significant differences between Strabismus Angle with Negative Fusion and Negative Fusional Vergence; and there are no significant differences between Strabismus Angle with Positive Fusion Range,Positive Fusional Vergence,Near Point Of Convergence,AC/A Rate. Key words: Intermittent Exotropia; Strabismus Angle; Positive and Negative Fusion Range; Positive and Negative Fusional Vergence; Near Point Of Convergence; AC/A Rate
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