ABSTRACT NUMBER - A244

Study on binocular visual function in intermittent exotropia patients


Yongqing Guan1, Liqun Ren2

Meeting:  2019 RANZCO


SESSION INFORMATION

Date:      -

Session Title: Strabismus

Session Time:      -

Purpose: To investigate the possible mechanism of intermittent exotropia.

Method: Measured the fusion range of the object, converged fusion and diverged fusion, as well as near and distant stereoscopy.

Results: There was no statistical significance in diverged fusion between the intermittent exotropia group and the normal control group (P > 0.05). The converged fusion in the intermittent exotropia group was significantly smaller than that of the normal control group (P < 0.01).The distant horizontal diverged fusion in the intermittent exotropia group was significantly larger than that of the normal control group. The difference showed statistical significance between the two groups (P < 0.01).The distant horizontal converged fusion in the intermittent exotropia group was significantly lower than that of the normal control group. The difference showed statistical significance between the two groups (P < 0.01).The distant stereopsis in the intermittent exotropia group was significantly lower than that of the control group. The difference showed statistical significance between the two groups (P < 0.01). Conclusion: (1) Discrete fusion of hyperfunction may be one of the mechanisms of intermittent exotropia. (2) The stereoscopic visual impairment of intermittent exotropia might firstly occur in the distant stereoscopic vision.

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