ICL 삽입술 후 일시적인 엎드린 자세가 Vaulting과 전방각에 미치는 영향
Effects of Transient Prone Position on Vault and Anterior Chamber Angle in ICL Implanted Patients
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목적: ICL (implantable Contact Lens) 삽입술을 받은 환자에서 일시적인 엎드린 자세가 vaulting및 전방각에 미치는 영향을 알아보고자 하였다. 대상과 방법: ICL 삽입술을 시행 받은 지 최소 1개월 이상 된 20명 40안에 대하여 전안부 빛간섭단층촬영계를 이용하여 앉은 자세에서그리고 상체를 90도 구부려 엎드린 자세에서 vaulting과 angle opening distance at 500 μm (AOD500)을 측정하여 비교하였다. 결과: Vaulting의 평균값은 앉은 자세에서 0.55 ± 0.21 mm였으며 엎드린 자세에서는 0.59 ± 0.21 mm로 증가하였다(p＜0.0001). 비측 및 이측에서 측정한 AOD500은 앉은 자세에서 각각 0.26 ± 0.11 mm, 0.28 ± 0.08 mm로 엎드린 자세에서 모두 감소하여 각각0.24 ± 0.10 mm, 0.26 ± 0.08 mm였으나 통계적으로 유의하지는 않았다(p=0.08, p=0.09). 결론: ICL 삽입술을 시행 후 일시적인 엎드린 자세는 vaulting을 증가시키는 것으로 나타났다.
Abstract
Purpose: To evaluate the effects of transient prone position on vault and anterior chamber angle parameters in ICL implanted patients. Methods: 40 eyes of 20 ICL implanted patients with at least 1 month of follow-up were included in the present study. The central ICL vault and anterior chamber parameters including angle opening distance at 500 (AOD500) were measured with the Visante anterior segment optical coherence tomography (OCT) (Carl Zeiss, Dublin, CA) in both the sitting and prone positions by tilting the OCT 90 degrees in the vertical axis and having the patient fixate downwards towards the floor. Results: The mean central vault was 0.55 ± 0.21 mm (SD) and 0.59 ± 0.21 mm (SD) in the sitting and prone positions, respectively (p < 0.0001). The nasal and temporal AOD500 were 0.26 ± 0.11 mm and 0.28 ± 0.08 mm, respectively in the sitting position, which decreased to 0.24 ± 0.10 mm and 0.26 ± 0.08 mm in the prone position, however, both were not statistically significant (p = 0.08, p = 0.09). AOD500 was inversely correlated with vault (r = -0.47; p = 0.0024). There were no significant correlations between increase of vault and anterior chamber depth or white to white nor ICL vault. Conclusions: Transient prone positioning of ICL implanted patients can induce a significant increase in ICL vault.
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