title: Open ring-shaped guider for circular continuous curvilinear capsulorhexis during cataract surgery.
abstract: We describe a new type of open-loop caliper for capsulorhexis during cataract surgery. This tool, which is made of poly(methyl methacrylate), can optimize capsulorhexis shape, size, and centration. One of the strengths of this tool, which derives from the open-loop design, is its ease of insertion and removal via a small incision site compared with other calipers used for capsulorhexis. The caliper is positioned on the anterior capsule after the anterior chamber is filled with an ophthalmic viscosurgical device and removed after creation of the continuous curvilinear capsulorhexis. The caliper enables the surgeon to achieve an ideal capsulorhexis and promotes long-lasting circularity.
  
  
  BACKGROUND
  Dr. Joo is one of the inventors on the patent filed by the Catholic University of Korea covering details in this manuscript. Dr. Lee has no financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Department of Ophthalmology & Visual Science, Seoul St. Mary's Hospital, College of Medicine, Catholic University of Korea, Seoul, South Korea.
authors.forename: Yong Eun
authors.initials: YE
authors.lastname: Lee
authors.affiliation: From the Department of Ophthalmology & Visual Science, Seoul St. Mary's Hospital, College of Medicine, Catholic University of Korea, Seoul, South Korea. Electronic address: ckjoo@catholic.ac.kr.
authors.forename: Choun-Ki
authors.initials: CK
authors.lastname: Joo
mesh_terms: D019923:Capsulorhexis / Q000295:instrumentation*; D006801:Humans; D019654:Lens Implantation, Intraocular; D018918:Phacoemulsification / Q000379:methods*