Abstract

DO.14.09

New technique of phaco surgery in small pupils

Malyugin B. 
S.Fyodorov Eye Microsurgery Complex, Moscow, Russia

Objective: To present the performance of the new injectable temporary pupil expansion device for cataract surgery.
Methods: The device is a temporary ring-shaped implant with four circular loops that holds the iris at equidistant points. The current version of the device consists of a holder with a ring and inserter. To assess the impact of the injection method of ring implantation on the iris we performed phaco on 5 cadaver eyes. In a series of 37 patients with small pupils unresponsive to conventional pupil dilation techniques we assessed the clinical performance of the new device.
Results: Scanning electronic microscopy of cadaver irises after ring implantation showed minimal disturbance of the iris pigmented epithelial layer. Clinically there were minimal surgical complications in eyes managed with the ring. We present variable techniques of using the new device in challenging clinical cases.
Conclusions: The new iris ring has the advantage of enlarging the pupil without overly stretching it and traumatizing it. The ring expands the pupil, protects the iris sphincter during surgery, and allows the pupil to return to its normal shape, size, and function after the operation.

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