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Dynamic Vaulting Changes in V4c versus V4 Posterior Chamber Phakic Lenses Under Differing Lighting Conditions

Published:August 18, 2014DOI:https://doi.org/10.1016/j.ajo.2014.08.020

      Purpose

      To compare vaulting changes in eyes implanted with V4c and V4 implantable collamer lenses (ICLs) under differing lighting conditions.

      Design

      Noninterventional, cross-sectional comparative observational case series.

      Methods

      Fifty-six eyes of 38 patients implanted with V4c ICLs, and 54 eyes of 28 patients implanted with V4 ICLs were enrolled and analyzed. Anterior chamber depth, pupil size and postoperative vaulting were evaluated using a Visante optical coherence tomography system under photopic and mesopic conditions 1 month postoperatively. Refractive errors, keratometry values, axial lengths, intraocular pressures, anterior chamber volumes, and central corneal thicknesses were also recorded.

      Results

      No significant differences were noted in anterior chamber depth between photopic and mesopic conditions in either group. Significant decreases in vaulting and pupil size were detected under photopic conditions in both groups. Moreover, vaulting changes in eyes implanted with V4c ICLs were significantly larger than those in eyes implanted with V4 ICLs.

      Conclusions

      V4c ICL vaulting decreased more prominently under photopic conditions than did V4 ICL vaulting. Therefore, postoperative vaulting under mesopic and photopic conditions should be considered when interpreting the vaulting of eyes implanted with V4c ICLs.
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      Biography

      Hun Lee, MD, is currently pursuing his first year of corneal fellowship in Yonsei University College of Medicine, Severance hospital, Seoul, South Korea. He graduated from Yonsei University College of Medicine in 2006, where he completed his ophthalmology residency in 2011. His research interests are dry eye and refractive surgery.