L & E x perimenta l i n ic lp Journal of Clinical & Experimental ht f h ...
Journal of Clinic
al & Experimenta ISSN: 2155-9570
y
l Ophthalmolog
Journal of Clinical & Experimental
Ophthalmology
Yaguchi et al., J Clin Exp Ophthalmol 2016, 7:2 DOI: 10.4172/2155-9570.1000541
Research Article
Open Access
Objective Evaluation of Zonular Weakness: Measurement of Lens Movement at the Start of Capsulorhexis Using Extracted Porcine Eyes
Yukari Yaguchi1,2, Shigeo Yaguchi3*, Saori Yaguchi2,4, Tadahiko Kozawa3, Yuichiro Tanaka3, Kazuno Negishi2 and Kazuo Tsubota2 1Department of Ophthalmology, Tokyo Dental College, Ichikawa General Hospital, Chiba, Japan 2Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan 3Kozawa Eye Hospital and Diabetes Center, Mito, Japan 4Department of Ophthalmology, Tokyo Dental College Suidobashi Hospital, Tokyo, Japan *Corresponding author: Shigeo Yaguchi, Kozawa Eye Hospital and Diabetes Center 246, Yoshizawa-Cho, Mito-City, Ibaraki Pref, 310-0845, Japan, Tel: +81-29-246-2111; Fax: +81-29-304-5111; E-mail: yaguchis@hotmail.co.jp, yaguchi@kozawa-ganka.or.jp Received date: March 14, 2016; Accepted date: April 22, 2016; Published date: April 24, 2016
Copyright: ? 2016 Yaguchi Y, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
Objective: To evaluate the degree of zonular weakness based on lens movement at the start of capsulorhexis using extracted porcine eyes.
Methods: Zonular dehiscence of 18?, 36?, and 54? was created and alternated with healthy areas into five zones to create a model simulation of weakness of the zonule of Zinn corresponding to dehiscence of 90?, 180?, and 270?. During continuous curvilinear capsulorhexis (CCC), an image displaying the anterior capsule grasped by a cystotome and another displaying the initial tear were captured, and the two images were superimposed to measure the movement distance of the cortical opacities created using a hook. Porcine eyes with no dehiscence were used as the control group.
Results: Compared with a distance of 0.44 ? 0.13 mm in the control group, the cortical opacity movement distances in the weakness group with dehiscence corresponding to 90?, 180?, and 270? were 0.68 ? 0.27, 1.01 ? 0.22, and 1.32 ? 0.35 mm, respectively. Significant differences were observed between the control, 90?, 180?, and 270? dehiscence groups (P ................
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