continuous curvilinear capsulorrhexis

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By Richard L. Lindstrom, MD – Ocular Surgery News U.S. Edition, May 25, 2016

Extracapsular cataract extraction was pioneered by Jacques Daviel in 1747. Even in those pioneering years, an anterior capsulotomy was required. In these early cases, the anterior capsule was torn open with a sharp instrument, the first cystotome. Albrecht von Graefe, in 1850, just over 100 years later, refined creation of the anterior capsular opening to a capsulectomy, using forceps to lacerate and remove a portion of the anterior capsule. In 1917, Ignacio Barraquer led ophthalmic surgeons away from extracapsular cataract extraction to intracapsular cataract extraction, and ICCE dominated over ECCE until the 1980s. It is interesting and amazingly insightful that Sir Harold Ridley chose ECCE and a posterior chamber location for the very first IOL implant surgery he performed at St. Thomas’ Hospital in London on Nov. 29, 1947. Nov. 29 is my birthday, and I was exactly 2 years old when the first ECCE with a posterior chamber lens was performed.

Many surgeons tried to make ICCE with iris-supported and anterior chamber IOLs work well, but IOL fixation was poor, lens implant sequestration from metabolically active tissues absent, and complication rates unacceptable. Cornelius Binkhorst and John Pearce, among others, returned us to ECCE to achieve stable IOL fixation and eventually total sequestration of the IOL in the capsular bag, reducing inflammation. In 1967, Charles Kelman introduced phacoemulsification, and a decade later, Steve Shearing led us back to the posterior chamber as a preferred location for an IOL. Richard Kratz refined our method of anterior capsulectomy with the so-called “can opener” technique, and this was the approach I first learned in 1978 when I did my first ECCE and phacoemulsification cases while doing a fellowship with William S. Harris, MD, in Dallas.

In 1980, my good friend Calvin Fercho from Fargo, North Dakota, showed me a technique that used three to four connected long anterior capsular tears rather than multiple small punctures or cuts. This approach was the predecessor to the ultimate continuous curvilinear capsulorrhexis (CCC) developed and taught by Howard Gimbel, Thomas Neuhann and Kimiya Shimizu a few years later. The CCC significantly reduced intraoperative complications such as anterior capsular rim tear with potential vitreous loss and improved IOL centration and sequestration in the capsular bag. Of interest, either a cystotome or capsular forceps, similar to Daviel and von Graefe, were used to create the far more elegant CCC.

Now we are in a new era of innovation, advancing the art and science of CCC. The goal is to make the CCC perfectly round and of the ideal size for IOL optic overlap to enhance IOL centration and reduce tilt. For a 6-mm optic, this size appears to be ideally between 5.25 mm and 5.75 mm. This size is also compatible with modern phacoemulsification and small-incision ECCE techniques, and is further reinforced by the finding that the anterior capsule is thicker and more robust to anterior capsular rim tears in this zone.

Read More at Healio.com

For More Information
The iData report series on ophthalmic devices covers the U.S. and Europe and includes data on markets for OCTs, fundus cameras, slit lamps, perimeters, tonometers, ophthalmic ultrasound systems, corneal topographers, wavefront aberrometers, phacoemulsification consoles, intraocular lenses, and phakic intraocular lenses. Full reports provide a comprehensive analysis including procedure numbers, units sold, market value, forecasts, as well as detailed competitive market shares and analyses of major players’ success strategies in each market and segment.

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