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목적 : To investigate the changes in ocular deviation after the monocular occlusion test in adult patients with intermittent exotropia.
방법 : We retrospectively enrolled adult patients (≥ 18 years) with intermittent exotropia who visited our clinic from September 2015 to May 2019. Patients with basic intermittent exotropia with a distance deviation within 10 prism diopters (PD) of the near deviation were included in this study. The level of control was measured using the Look And Cover, then Ten seconds of Observation Scale for Exotropia (LACTOSE) control scoring system. Ocular deviations at distant and near fixations before and after the monocular occlusion test were compared.
결과 : Forty-six consecutive patients (18 female; mean age: 34.3 years) were enrolled. The mean ocular deviation was 36.3 PD (range: 18–75) at distant and 38.5 PD (range: 18–80) at near, which significantly increased to 38.5 PD (p = 0.043) and 41.1 PD (p = 0.011), respectively after monocular occlusion. An increase of ≥ 5 PD was seen in 14 (30.4%) and 15 (32.6%) patients at distant and near fixations, respectively. The percentage of patients with an increase of ≥ 5 PD increased with a better level of control (p = 0.225 for the distant control score; p = 0.009 for the near control score).
결론 : The monocular occlusion test may be helpful to determine the largest ocular deviation in adult patients with intermittent exotropia. Approximately one-third of the included adult patients with intermittent exotropia showed an increase in ocular deviation of ≥ 5 PD. Patients with a good level of control were more likely to show an increase in ocular deviation.
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