Effects of Prone Positioning on Critical Distance in Iris-Claw Phakic Intraocular Lens-Implanted Eyes.

Kim, Wook Kyum; Kim, Hee Sun; Cho, Eun Young; Kim, Jin Kook; Yang, Hun

doi:2012.53.9.1254

J Korean Ophthalmol Soc > Volume 53(9); 2012 > Article

Original Article

Journal of the Korean Ophthalmological Society 2012;53(9):1254-1259.
DOI: https://doi.org/10.3341/jkos.2012.53.9.1254 Published online September 15, 2012.

Effects of Prone Positioning on Critical Distance in Iris-Claw Phakic Intraocular Lens-Implanted Eyes.

Wook Kyum Kim, Hee Sun Kim, Eun Young Cho, Jin Kook Kim, Hun Yang

¹B&VIIT Eye Center, Seoul, Korea. hunny502@hanmail.net
²KAIST GSMSE, Daejeon, Korea.

홍채고정안내렌즈 삽입술 후 엎드린 자세가 임계거리에 미치는 영향

김욱겸¹^,²⋅김희선¹⋅조은영¹⋅김진국¹^,²⋅양 훈¹

B&VIIT Eye Center¹, Seoul, Korea
KAIST GSMSE², Daejeon, Korea

Abstract

PURPOSE
To evaluate the effects of prone positioning on the critical distance (CD) in Artiflex (Ophtec BV) foldable anterior iris-claw phakic intraocular lens (pIOL)-implanted eyes. METHODS: Twenty patients with 40 Artiflex-implanted eyes were prospectively enrolled in the present study. The nasal and temporal critical distances (CD) were measured with Visante anterior segment optical coherence tomography (OCT, Carl Zeiss, Dublin, CA) in both the sitting and prone positions. RESULTS: The mean nasal CD was 1.52 +/- 0.15 mm in the sitting position and 1.49 +/- 0.13 mm in the prone position (p = 0.01). The mean temporal CD was 1.63 +/- 0.17 mm in the sitting position and 1.63 +/- 0.16 mm in the prone position (p = 0.67). In a multiple regression analysis, the changes in nasal CD were positively correlated with anterior chamber volume (r = 0.27; p = 0.01) and negatively correlated with pupil size (r = -0.23; p < 0.01). CONCLUSIONS: Prone positioning can induce a decrease in the nasal CD in Artiflex-implanted patients, especially in subjects with small pupils and large anterior chamber volumes.

Key Words: Artiflex;Critical distance;Iris claw;Phakic intraocular lens;Prone position