J Korean Ophthalmol Soc.  2012 Sep;53(9):1254-1259. 10.3341/jkos.2012.53.9.1254.

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

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

Keyword

Artiflex; Critical distance; Iris claw; Phakic intraocular lens; Prone position

MeSH Terms

Anterior Chamber
Eye
Humans
Miosis
Phakic Intraocular Lenses
Prone Position
Prospective Studies
Pupil
Tomography, Optical Coherence

Figure

  • Figure 1 Box plot showing the change of critical distance nasal (A) and temporal (B) between sitting and prone position.


Cited by  1 articles

Clinical Outcomes of Foldable Iris-Fixed Phakic Intraocular Lens and Change in Corneal Endothelial Cell Density
San Seong, Chul Myung Choi, Tae Hoon Choi, Se Kyung Kim
J Korean Ophthalmol Soc. 2015;56(7):1020-1027.    doi: 10.3341/jkos.2015.56.7.1020.


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