Thorough visualisation of the lens is important for safe and effective cataract surgery. This is best achieved when pupils are adequately dilated throughout the procedure. Although mydriatic eye drops produce the required dilation in most cases, mechanical intervention, namely hooks and additional incisions, is required when these pharmacological agents fail.
The Malyugin ring (MicroSurgical Technology) was developed as a safe alternative to traditional pupil-expansion approaches. It is square in shape and has four circular scrolls with eight points of fixation that ensure an evenly dilated circular pupil is achieved. The latest version is made of 5.0 polypropylene.
A stand-out advantage of the device is that the ring, with its diameter of 6.25 or 7.0 mm, can be inserted through main corneal incisions as small as 2.0 mm – a feature that enables the ring’s use at any time during the surgery and eliminates the need for additional incisions.
However, although the ring offers such advantages and reduces the challenges associated with operating on eyes with small pupils, it has an associated learning curve and must be mastered to avoid difficulties or complications during surgery.