Original articleDynamic Vaulting Changes in V4c versus V4 Posterior Chamber Phakic Lenses Under Differing Lighting Conditions
Section snippets
Design
This retrospective, comparative case series was performed with the approval of the Institutional Review Board of Yonsei University College of Medicine (Seoul, South Korea) and conducted in accordance with the tenets of the Declaration of Helsinki and good clinical practices. All patients provided written informed consent.
Participants
This study comprised 110 eyes of 66 patients who underwent V4c or V4 ICL implantation in a standardized fashion by the same surgeon (SYK) at the Eyereum Eye Clinic, Seoul,
Results
The preoperative and 1-month postoperative patient data are summarized in Table 1. Postoperative vaulting, ACD, and pupil sizes of the eyes implanted with V4c and V4 ICLs under photopic and mesopic conditions are demonstrated in Table 2.
In eyes implanted with V4c and V4 ICLs there were significant differences in vaulting between photopic and mesopic conditions. In eyes implanted with V4c ICLs, the mean results for vaulting under photopic and mesopic conditions were 399.5 ± 151.9 μM and 547.0 ±
Discussion
In this study, we measured postoperative ICL vaulting, ACD, and pupil size of eyes implanted with V4c and V4 ICLs under differing lighting conditions, and we demonstrated significant decreases in vaulting and pupil size under photopic conditions. More important, decreases in vaulting after photopic light exposure were more remarkable in eyes implanted with V4c ICLs.
The observed vaulting changes from posterior movement of the ICL under photopic conditions are assumed to be associated with pupil
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.
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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.