Eyeworld

EW CATARACT 52 byline plus face Device focus Several published studies have raised additional questions about whether the femtosecond laser capsulotomy is more likely to tear compared to a manual continuous curvilinear capsulorhexis (CCC). Mynosys has developed the Zepto Precision Pulse Capsulotomy (PPC) device, which is a disposable, handheld instrument that would be used in the normal surgical sequence instead of a cystotome and capsule forceps. The instrument tip consists of a circular nitinol ring with an edge that is precision engineered on a micron scale. The ring is elongated and compressed for insertion through a small clear corneal incision. Because nitinol is a super elastic shape memory alloy, the ring immediately reassumes its native circular shape once it enters the OVD-filled anterior chamber. The initial model developed will produce a 5-mm diameter capsulot- omy. The cutting ring is surrounded by a thin, clear silicone shell that is used to apply gentle suction to the anterior capsule against which it is apposed. This suction brings the A new disposable, handheld device could automate creation of a perfect, circular capsulotomy A t the 2015 American Academy of Ophthalmol- ogy (AAO) meeting in Las Vegas, David F. Chang, MD, clinical professor, University of California, San Francisco, and in practice in Los Altos, Calif., discussed the Zepto capsulotomy instrument (Mynosys, Fremont, Calif.), a new disposable technology aimed at automating production of a stronger and perfect- ly sized anterior capsulotomy. Creating a perfectly round anterior capsulotomy of a precise diameter is one advantage offered by the femtosecond laser. "However, this technology entails significant costs that are usually borne by the patient, if and when such billing is allowed," Dr. Chang said. "The size of the laser and the need for imaging and docking create logis- tical workflow issues and limit its utility for eyes with small pupils." by Ellen Stodola EyeWorld Staff Writer New technology for capsulotomy Scanning electron microscopy shows that the Zepto capsulotomy edge has a unique morphology characterized by an extremely smooth functional edge (arrow). Detailed analysis revealed that Zepto not only creates a perfectly round, tag-free opening in the capsule, but at the same time places a microscopic eversion at the edge to present a small amount of the capsule underside for maximal edge integrity during surgery. continued on page 54

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